bump version

rm semicolon
Salesforce provider: add Option to specify Production vs. Sandbox environment (#223 )
2017-12-29 01:58:14 -05:00 · 2017-12-29 01:57:41 -05:00 · 2017-12-29 01:56:14 -05:00 · 2017-12-08 11:20:09 -05:00 · 2017-12-08 10:51:14 -05:00 · 2017-12-08 10:38:01 -05:00
77 changed files with 1301 additions and 23 deletions
--- a/OwinOAuthProviders.sln
+++ b/OwinOAuthProviders.sln
@@ -1,6 +1,6 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 14
-VisualStudioVersion = 14.0.25420.1
+# Visual Studio 15
+VisualStudioVersion = 15.0.26730.12
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Owin.Security.Providers.ArcGISOnline", "src\Owin.Security.Providers.ArcGISOnline\Owin.Security.Providers.ArcGISOnline.csproj", "{8A49FAEF-D365-4D25-942C-1CAD03845A5E}"
 EndProject
@@ -110,6 +110,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Owin.Security.Providers.WSO
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Owin.Security.Providers.Podbean", "src\Owin.Security.Providers.Podbean\Owin.Security.Providers.Podbean.csproj", "{A7B95FD4-08AD-499F-B574-07560CC2A63F}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Owin.Security.Providers.ArcGISPortal", "src\Owin.Security.Providers.ArcGISPortal\Owin.Security.Providers.ArcGISPortal.csproj", "{18547CA4-D7D3-43C2-81C2-A21FC8151A93}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -332,6 +334,10 @@ Global
 		{A7B95FD4-08AD-499F-B574-07560CC2A63F}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{A7B95FD4-08AD-499F-B574-07560CC2A63F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A7B95FD4-08AD-499F-B574-07560CC2A63F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{18547CA4-D7D3-43C2-81C2-A21FC8151A93}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{18547CA4-D7D3-43C2-81C2-A21FC8151A93}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{18547CA4-D7D3-43C2-81C2-A21FC8151A93}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{18547CA4-D7D3-43C2-81C2-A21FC8151A93}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
--- a/OwinOAuthProvidersDemo/App_Start/Startup.Auth.cs
+++ b/OwinOAuthProvidersDemo/App_Start/Startup.Auth.cs
@@ -4,6 +4,7 @@ using Microsoft.Owin.Security.Cookies;
 using Owin;
 using Owin.Security.Providers.Evernote;
 using Owin.Security.Providers.PayPal;
+using Owin.Security.Providers.ArcGISPortal;

 namespace OwinOAuthProvidersDemo
 {
@@ -125,14 +126,50 @@ namespace OwinOAuthProvidersDemo
            //    clientId: "",
            //    clientSecret: "");

-            //in scenarios where a sandbox URL needs to be used
-            //var salesforceOptions = new SalesforceAuthenticationOptions
+            // Salesforce Option 1: don't specify explicit Endpoint config and use Production endpoint defaults
+            //var salesforceOptions1 = new SalesforceAuthenticationOptions
+            //{
+            //    ClientId = "",
+            //    ClientSecret = "",
+            //    Provider = new SalesforceAuthenticationProvider()
+            //    {
+            //        OnAuthenticated = async context =>
+            //        {
+            //            System.Diagnostics.Debug.WriteLine(context.AccessToken);
+            //            System.Diagnostics.Debug.WriteLine(context.RefreshToken);
+            //            System.Diagnostics.Debug.WriteLine(context.OrganizationId);
+            //        }
+            //    }
+            //};
+
+            // Salesforce Option 2: ask for Sandbox environment; no need to know what those endpoints are
+            //var salesforceOptions2 = new SalesforceAuthenticationOptions
            //{
            //    Endpoints =
            //        new SalesforceAuthenticationOptions.SalesforceAuthenticationEndpoints
            //        {
-            //            AuthorizationEndpoint =
-            //                "https://ap1.salesforce.com/services/oauth2/authorize",
+            //            Environment = Owin.Security.Providers.Salesforce.Constants.SandboxEnvironment
+            //        },
+            //    ClientId = "",
+            //    ClientSecret = "",
+            //    Provider = new SalesforceAuthenticationProvider()
+            //    {
+            //        OnAuthenticated = async context =>
+            //        {
+            //            System.Diagnostics.Debug.WriteLine(context.AccessToken);
+            //            System.Diagnostics.Debug.WriteLine(context.RefreshToken);
+            //            System.Diagnostics.Debug.WriteLine(context.OrganizationId);
+            //        }
+            //    }
+            //};
+
+            // Salesforce Option 3: explicitly specify endpoints (will take precedence over Environment choice)
+            //var salesforceOptions3 = new SalesforceAuthenticationOptions
+            //{
+            //    Endpoints =
+            //        new SalesforceAuthenticationOptions.SalesforceAuthenticationEndpoints
+            //        {
+            //            AuthorizationEndpoint = "https://ap1.salesforce.com/services/oauth2/authorize",
            //            TokenEndpoint = "https://ap1.salesforce.com/services/oauth2/token"
            //        },
            //    ClientId = "",
@@ -147,7 +184,7 @@ namespace OwinOAuthProvidersDemo
            //        }
            //    }
            //};
-            //app.UseSalesforceAuthentication(salesforceOptions);
+            //app.UseSalesforceAuthentication(salesforceOptions1);

            ////app.UseShopifyAuthentication("", "");

@@ -155,6 +192,12 @@ namespace OwinOAuthProvidersDemo
            //    clientId: "",
            //    clientSecret: "");

+            //app.UseArcGISPortalAuthentication(new ArcGISPortalAuthenticationOptions(
+            //    "My ArcGIS Portal",
+            //    "https://arcgisportal.mydomain.com/",
+            //    "",
+            //    ""));
+
            //app.UseWordPressAuthentication(
            //    clientId: "",
            //    clientSecret: "");
--- a/OwinOAuthProvidersDemo/Controllers/AccountController.cs
+++ b/OwinOAuthProvidersDemo/Controllers/AccountController.cs
@@ -419,6 +419,13 @@ namespace OwinOAuthProvidersDemo.Controllers
                    properties.Dictionary[ShopNameKey] = ShopName;
                }

+                // if use Salesforce as OAuth provider you can ask for Sandbox auth endpoint 
+                // for this particular request only
+                //properties.Dictionary.Add(
+                //    Owin.Security.Providers.Salesforce.Constants.EnvironmentAuthenticationProperty,
+                //    Owin.Security.Providers.Salesforce.Constants.SandboxEnvironment
+                //    );
+
                context.HttpContext.GetOwinContext().Authentication.Challenge(properties, LoginProvider);
            }
        }
--- a/OwinOAuthProvidersDemo/OwinOAuthProvidersDemo.csproj
+++ b/OwinOAuthProvidersDemo/OwinOAuthProvidersDemo.csproj
@@ -32,6 +32,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -40,6 +41,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Antlr3.Runtime, Version=3.5.0.2, Culture=neutral, PublicKeyToken=eb42632606e9261f, processorArchitecture=MSIL">
@@ -261,6 +263,10 @@
      <Project>{8a49faef-d365-4d25-942c-1cad03845a5e}</Project>
      <Name>Owin.Security.Providers.ArcGISOnline</Name>
    </ProjectReference>
+    <ProjectReference Include="..\src\Owin.Security.Providers.ArcGISPortal\Owin.Security.Providers.ArcGISPortal.csproj">
+      <Project>{18547ca4-d7d3-43c2-81c2-a21fc8151a93}</Project>
+      <Name>Owin.Security.Providers.ArcGISPortal</Name>
+    </ProjectReference>
    <ProjectReference Include="..\src\Owin.Security.Providers.Asana\Owin.Security.Providers.Asana.csproj">
      <Project>{f3e27220-1d8c-4037-94aa-7b7f4a12f351}</Project>
      <Name>Owin.Security.Providers.Asana</Name>
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@
 Provides a set of extra authentication providers for OWIN ([Project Katana](http://katanaproject.codeplex.com/)).  This project includes providers for:
 - OAuth
  - ArcGISOnline
+  - ArcGISPortal
  - Asana
  - Backlog
  - Battle.net
--- a/Rakefile.rb
+++ b/Rakefile.rb
@@ -15,7 +15,7 @@ PACKAGES = File.expand_path("packages")
 TOOLS = File.expand_path("tools")
 NUGET = File.expand_path("#{TOOLS}/nuget")
 NUGET_EXE = File.expand_path("#{TOOLS}/nuget/nuget.exe")
-@version = "2.17.0"
+@version = "2.19.0"
 PROJECTS = Dir.glob('src/*').select{|dir| File.directory? dir }

 desc 'Retrieve things'
@@ -70,8 +70,8 @@ desc 'publish nugets'
 task :nuspec_publish do
  PROJECTS.each{|dir|
    Dir.chdir(dir) do
-      sh "#{NUGET_EXE} push #{FileList["*.nupkg"].first}"
+      sh "#{NUGET_EXE} push -Source https://api.nuget.org/v3/index.json #{FileList["*.nupkg"].first}"
    end
  }
-  sh "#{NUGET_EXE} push #{FileList["*.nupkg"].first}"
+  sh "#{NUGET_EXE} push -Source https://api.nuget.org/v3/index.json #{FileList["*.nupkg"].first}"
 end
--- a/base/Owin.Security.Providers.OpenIDBase/Owin.Security.Providers.OpenIDBase.csproj
+++ b/base/Owin.Security.Providers.OpenIDBase/Owin.Security.Providers.OpenIDBase.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/nuget.rake
+++ b/nuget.rake
@@ -10,12 +10,12 @@ namespace :nuget do
      begin
      FileUtils.mkdir_p("#{NUGET}")
      File.open("#{NUGET}/nuget.exe", "wb") do |file|
-        file.write open('http://nuget.org/nuget.exe', {ssl_verify_mode: OpenSSL::SSL::VERIFY_NONE}).read
+        file.write open('https://dist.nuget.org/win-x86-commandline/latest/nuget.exe', {ssl_verify_mode: OpenSSL::SSL::VERIFY_NONE}).read
      end
    rescue
      FileUtils.rm_rf("#{NUGET}/nuget.exe")
      File.open("#{NUGET}/nuget.exe", "wb") do |file|
-        file.write open('https://dist.nuget.org/win-x86-commandline/v3.2.0/nuget.exe', {ssl_verify_mode: OpenSSL::SSL::VERIFY_NONE}).read
+        file.write open('https://dist.nuget.org/win-x86-commandline/latest/nuget.exe', {ssl_verify_mode: OpenSSL::SSL::VERIFY_NONE}).read
      end
    end
    end
--- a/src/Owin.Security.Providers.ArcGISOnline/Owin.Security.Providers.ArcGISOnline.csproj
+++ b/src/Owin.Security.Providers.ArcGISOnline/Owin.Security.Providers.ArcGISOnline.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.ArcGISPortal/ArcGISPortalAuthenticationExtensions.cs
+++ b/src/Owin.Security.Providers.ArcGISPortal/ArcGISPortalAuthenticationExtensions.cs
@@ -0,0 +1,20 @@
+using System;
+
+namespace Owin.Security.Providers.ArcGISPortal
+{
+    public static class ArcGISPortalAuthenticationExtensions
+    {
+        public static IAppBuilder UseArcGISPortalAuthentication(this IAppBuilder app,
+            ArcGISPortalAuthenticationOptions options)
+        {
+            if (app == null)
+                throw new ArgumentNullException(nameof(app));
+            if (options == null)
+                throw new ArgumentNullException(nameof(options));
+
+            app.Use(typeof(ArcGISPortalAuthenticationMiddleware), app, options);
+
+            return app;
+        }
+    }
+}
--- a/src/Owin.Security.Providers.ArcGISPortal/ArcGISPortalAuthenticationHandler.cs
+++ b/src/Owin.Security.Providers.ArcGISPortal/ArcGISPortalAuthenticationHandler.cs
@@ -0,0 +1,234 @@
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Security.Claims;
+using System.Threading.Tasks;
+using Microsoft.Owin.Infrastructure;
+using Microsoft.Owin.Logging;
+using Microsoft.Owin.Security;
+using Microsoft.Owin.Security.Infrastructure;
+using Newtonsoft.Json;
+
+namespace Owin.Security.Providers.ArcGISPortal
+{
+    public class ArcGISPortalAuthenticationHandler : AuthenticationHandler<ArcGISPortalAuthenticationOptions>
+    {
+        private const string XmlSchemaString = "http://www.w3.org/2001/XMLSchema#string";
+
+        private readonly ILogger _logger;
+        private readonly HttpClient _httpClient;
+        private readonly string _host;
+
+        public ArcGISPortalAuthenticationHandler(HttpClient httpClient, ILogger logger, string host)
+        {
+            _httpClient = httpClient;
+            _logger = logger;
+            _host = host;
+        }
+
+        protected override async Task<AuthenticationTicket> AuthenticateCoreAsync()
+        {
+            AuthenticationProperties properties = null;
+
+            try
+            {
+                string code = null;
+                string state = null;
+
+                var query = Request.Query;
+                var values = query.GetValues("code");
+                if (values != null && values.Count == 1)
+                {
+                    code = values[0];
+                }
+                values = query.GetValues("state");
+                if (values != null && values.Count == 1)
+                {
+                    state = values[0];
+                }
+
+                properties = Options.StateDataFormat.Unprotect(state);
+                if (properties == null)
+                {
+                    return null;
+                }
+                // OAuth2 10.12 CSRF
+                if (!ValidateCorrelationId(properties, _logger))
+                {
+                    return new AuthenticationTicket(null, properties);
+                }
+
+                var requestPrefix = Request.Scheme + "://" + Request.Host;
+                var redirectUri = requestPrefix + Request.PathBase + Options.CallbackPath;
+
+                // Build up the body for the token request
+                var body = new List<KeyValuePair<string, string>>
+                {
+                    new KeyValuePair<string, string>("grant_type", "authorization_code"),
+                    new KeyValuePair<string, string>("code", code),
+                    new KeyValuePair<string, string>("redirect_uri", redirectUri),
+                    new KeyValuePair<string, string>("client_id", Options.ClientId),
+                    new KeyValuePair<string, string>("client_secret", Options.ClientSecret)
+                };
+
+                // Request the token
+                var requestMessage = new HttpRequestMessage(HttpMethod.Post, Options.Endpoints.TokenEndpoint);
+                requestMessage.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
+                requestMessage.Content = new FormUrlEncodedContent(body);
+                var tokenResponse = await _httpClient.SendAsync(requestMessage);
+                tokenResponse.EnsureSuccessStatusCode();
+                var text = await tokenResponse.Content.ReadAsStringAsync();
+
+                // Deserializes the token response
+                dynamic response = JsonConvert.DeserializeObject<dynamic>(text);
+                var accessToken = (string)response.access_token;
+                var refreshToken = (string)response.refresh_token;
+
+                // Get the ArcGISPortal user
+                var userRequest = new HttpRequestMessage(HttpMethod.Get, Options.Endpoints.UserInfoEndpoint + "?f=json&token=" + Uri.EscapeDataString(accessToken));
+                userRequest.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
+                var userResponse = await _httpClient.SendAsync(userRequest, Request.CallCancelled);
+                userResponse.EnsureSuccessStatusCode();
+                text = await userResponse.Content.ReadAsStringAsync();
+                var user = JsonConvert.DeserializeObject<Provider.ArcGISPortalUser>(text);
+
+                var context = new ArcGISPortalAuthenticatedContext(Context, user, accessToken, refreshToken, _host)
+                {
+                    Identity = new ClaimsIdentity(
+                        Options.AuthenticationType,
+                        ClaimsIdentity.DefaultNameClaimType,
+                        ClaimsIdentity.DefaultRoleClaimType)
+                };
+                if (!string.IsNullOrEmpty(context.Id))
+                {
+                    context.Identity.AddClaim(new Claim(ClaimTypes.NameIdentifier, context.Id, XmlSchemaString, Options.AuthenticationType));
+                }
+                if (!string.IsNullOrEmpty(context.UserName))
+                {
+                    context.Identity.AddClaim(new Claim(ClaimsIdentity.DefaultNameClaimType, context.UserName, XmlSchemaString, Options.AuthenticationType));
+                }
+                if (!string.IsNullOrEmpty(context.Email))
+                {
+                    context.Identity.AddClaim(new Claim(ClaimTypes.Email, context.Email, XmlSchemaString, Options.AuthenticationType));
+                }
+                if (!string.IsNullOrEmpty(context.Name))
+                {
+                    context.Identity.AddClaim(new Claim("urn:ArcGISPortal:name", context.Name, XmlSchemaString, Options.AuthenticationType));
+                }
+                if (!string.IsNullOrEmpty(context.Link))
+                {
+                    context.Identity.AddClaim(new Claim("urn:ArcGISPortal:url", context.Link, XmlSchemaString, Options.AuthenticationType));
+                }
+
+                context.Properties = properties;
+
+                await Options.Provider.Authenticated(context);
+
+                return new AuthenticationTicket(context.Identity, context.Properties);
+            }
+            catch (Exception ex)
+            {
+                _logger.WriteError(ex.Message);
+            }
+            return new AuthenticationTicket(null, properties);
+        }
+
+        protected override Task ApplyResponseChallengeAsync()
+        {
+            if (Response.StatusCode != 401)
+            {
+                return Task.FromResult<object>(null);
+            }
+
+            var challenge = Helper.LookupChallenge(Options.AuthenticationType, Options.AuthenticationMode);
+
+            if (challenge == null) return Task.FromResult<object>(null);
+            var baseUri =
+                Request.Scheme +
+                Uri.SchemeDelimiter +
+                Request.Host +
+                Request.PathBase;
+
+            var currentUri =
+                baseUri +
+                Request.Path +
+                Request.QueryString;
+
+            var redirectUri =
+                baseUri +
+                Options.CallbackPath;
+            var properties = challenge.Properties;
+            if (string.IsNullOrEmpty(properties.RedirectUri))
+            {
+                properties.RedirectUri = currentUri;
+            }
+
+            GenerateCorrelationId(properties);
+            var state = Options.StateDataFormat.Protect(properties);
+            // comma separated
+            var scope = string.Join(",", Options.Scope);
+
+            var authorizationEndpoint =
+                Options.Endpoints.AuthorizationEndpoint +
+                "?client_id=" + Uri.EscapeDataString(Options.ClientId) +
+                "&response_type=" + Uri.EscapeDataString(scope) +
+                "&redirect_uri=" + Uri.EscapeDataString(redirectUri) +
+                "&state=" + Uri.EscapeDataString(state);
+
+            Response.Redirect(authorizationEndpoint);
+
+            return Task.FromResult<object>(null);
+        }
+
+        public override async Task<bool> InvokeAsync()
+        {
+            return await InvokeReplyPathAsync();
+        }
+
+        private async Task<bool> InvokeReplyPathAsync()
+        {
+            if (!Options.CallbackPath.HasValue || Options.CallbackPath != Request.Path) return false;
+            // TODO: error responses
+
+            var ticket = await AuthenticateAsync();
+            if (ticket == null)
+            {
+                _logger.WriteWarning("Invalid return state, unable to redirect.");
+                Response.StatusCode = 500;
+                return true;
+            }
+
+            var context = new ArcGISPortalReturnEndpointContext(Context, ticket)
+            {
+                SignInAsAuthenticationType = Options.SignInAsAuthenticationType,
+                RedirectUri = ticket.Properties.RedirectUri
+            };
+
+            await Options.Provider.ReturnEndpoint(context);
+
+            if (context.SignInAsAuthenticationType != null &&
+                context.Identity != null)
+            {
+                var grantIdentity = context.Identity;
+                if (!string.Equals(grantIdentity.AuthenticationType, context.SignInAsAuthenticationType, StringComparison.Ordinal))
+                {
+                    grantIdentity = new ClaimsIdentity(grantIdentity.Claims, context.SignInAsAuthenticationType, grantIdentity.NameClaimType, grantIdentity.RoleClaimType);
+                }
+                Context.Authentication.SignIn(context.Properties, grantIdentity);
+            }
+
+            if (context.IsRequestCompleted || context.RedirectUri == null) return context.IsRequestCompleted;
+            var redirectUri = context.RedirectUri;
+            if (context.Identity == null)
+            {
+                // add a redirect hint that sign-in failed in some way
+                redirectUri = WebUtilities.AddQueryString(redirectUri, "error", "access_denied");
+            }
+            Response.Redirect(redirectUri);
+            context.RequestCompleted();
+
+            return context.IsRequestCompleted;
+        }
+    }
+}
--- a/src/Owin.Security.Providers.ArcGISPortal/ArcGISPortalAuthenticationMiddleware.cs
+++ b/src/Owin.Security.Providers.ArcGISPortal/ArcGISPortalAuthenticationMiddleware.cs
@@ -0,0 +1,87 @@
+using System;
+using System.Globalization;
+using System.Net.Http;
+using Microsoft.Owin;
+using Microsoft.Owin.Logging;
+using Microsoft.Owin.Security;
+using Microsoft.Owin.Security.DataHandler;
+using Microsoft.Owin.Security.DataProtection;
+using Microsoft.Owin.Security.Infrastructure;
+
+namespace Owin.Security.Providers.ArcGISPortal
+{
+    public class ArcGISPortalAuthenticationMiddleware : AuthenticationMiddleware<ArcGISPortalAuthenticationOptions>
+    {
+        private readonly HttpClient _httpClient;
+        private readonly ILogger _logger;
+
+        public ArcGISPortalAuthenticationMiddleware(OwinMiddleware next, IAppBuilder app,
+            ArcGISPortalAuthenticationOptions options)
+            : base(next, options)
+        {
+            if (string.IsNullOrWhiteSpace(Options.Host))
+                throw new ArgumentException(string.Format(CultureInfo.CurrentCulture,
+                    Resources.Exception_OptionMustBeProvided, "Host"));
+            if (string.IsNullOrWhiteSpace(Options.ClientId))
+                throw new ArgumentException(string.Format(CultureInfo.CurrentCulture,
+                    Resources.Exception_OptionMustBeProvided, "ClientId"));
+            if (string.IsNullOrWhiteSpace(Options.ClientSecret))
+                throw new ArgumentException(string.Format(CultureInfo.CurrentCulture,
+                    Resources.Exception_OptionMustBeProvided, "ClientSecret"));
+
+            _logger = app.CreateLogger<ArcGISPortalAuthenticationMiddleware>();
+
+            if (Options.Provider == null)
+                Options.Provider = new ArcGISPortalAuthenticationProvider();
+
+            if (Options.StateDataFormat == null)
+            {
+                var dataProtector = app.CreateDataProtector(
+                    typeof(ArcGISPortalAuthenticationMiddleware).FullName,
+                    Options.AuthenticationType, "v2");
+                Options.StateDataFormat = new PropertiesDataFormat(dataProtector);
+            }
+
+            if (string.IsNullOrEmpty(Options.SignInAsAuthenticationType))
+                Options.SignInAsAuthenticationType = app.GetDefaultSignInAsAuthenticationType();
+
+            _httpClient = new HttpClient(ResolveHttpMessageHandler(Options))
+            {
+                Timeout = Options.BackchannelTimeout,
+                MaxResponseContentBufferSize = 1024 * 1024 * 10,
+            };
+            _httpClient.DefaultRequestHeaders.UserAgent.ParseAdd("Microsoft Owin ArcGISPortal middleware");
+            _httpClient.DefaultRequestHeaders.ExpectContinue = false;
+        }
+
+        /// <summary>
+        ///     Provides the <see cref="T:Microsoft.Owin.Security.Infrastructure.AuthenticationHandler" /> object for processing
+        ///     authentication-related requests.
+        /// </summary>
+        /// <returns>
+        ///     An <see cref="T:Microsoft.Owin.Security.Infrastructure.AuthenticationHandler" /> configured with the
+        ///     <see cref="T:Owin.Security.Providers.ArcGISPortal.ArcGISPortalAuthenticationOptions" /> supplied to the constructor.
+        /// </returns>
+        protected override AuthenticationHandler<ArcGISPortalAuthenticationOptions> CreateHandler()
+        {
+            return new ArcGISPortalAuthenticationHandler(_httpClient, _logger, Options.Host);
+        }
+
+        private static HttpMessageHandler ResolveHttpMessageHandler(ArcGISPortalAuthenticationOptions options)
+        {
+            var handler = options.BackchannelHttpHandler ?? new WebRequestHandler();
+
+            // If they provided a validator, apply it or fail.
+            if (options.BackchannelCertificateValidator == null) return handler;
+            // Set the cert validate callback
+            var webRequestHandler = handler as WebRequestHandler;
+            if (webRequestHandler == null)
+            {
+                throw new InvalidOperationException(Resources.Exception_ValidatorHandlerMismatch);
+            }
+            webRequestHandler.ServerCertificateValidationCallback = options.BackchannelCertificateValidator.Validate;
+
+            return handler;
+        }
+    }
+}
--- a/src/Owin.Security.Providers.ArcGISPortal/ArcGISPortalAuthenticationOptions.cs
+++ b/src/Owin.Security.Providers.ArcGISPortal/ArcGISPortalAuthenticationOptions.cs
@@ -0,0 +1,171 @@
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using Microsoft.Owin;
+using Microsoft.Owin.Security;
+
+namespace Owin.Security.Providers.ArcGISPortal
+{
+    public class ArcGISPortalAuthenticationOptions : AuthenticationOptions
+    {
+        public class ArcGISPortalAuthenticationEndpoints
+        {
+            /// <summary>
+            /// Endpoint which is used to redirect users to request ArcGISPortal access
+            /// </summary>
+            /// <remarks>
+            /// Defaults to https://www.arcgis.com/sharing/rest/oauth2/authorize/
+            /// </remarks>
+            public string AuthorizationEndpoint { get; set; }
+
+            /// <summary>
+            /// Endpoint which is used to exchange code for access token
+            /// </summary>
+            /// <remarks>
+            /// Defaults to https://www.arcgis.com/sharing/rest/oauth2/token/
+            /// </remarks>
+            public string TokenEndpoint { get; set; }
+
+            /// <summary>
+            /// Endpoint which is used to obtain user information after authentication
+            /// </summary>
+            /// <remarks>
+            /// Defaults to https://www.arcgis.com/sharing/rest/community/self
+            /// </remarks>
+            public string UserInfoEndpoint { get; set; }
+        }
+
+        private const string AuthenticationTypeNameDefault = "ArcGIS Portal";
+
+        private const string AuthorizationEndPoint = "arcgis/sharing/rest/oauth2/authorize/";
+        private const string TokenEndpoint = "arcgis/sharing/rest/oauth2/token/";
+        private const string UserInfoEndpoint = "arcgis/sharing/rest/community/self";
+
+        /// <summary>
+        ///     Gets or sets the a pinned certificate validator to use to validate the endpoints used
+        ///     in back channel communications belong to ArcGISPortal.
+        /// </summary>
+        /// <value>
+        ///     The pinned certificate validator.
+        /// </value>
+        /// <remarks>
+        ///     If this property is null then the default certificate checks are performed,
+        ///     validating the subject name and if the signing chain is a trusted party.
+        /// </remarks>
+        public ICertificateValidator BackchannelCertificateValidator { get; set; }
+
+        /// <summary>
+        ///     The HttpMessageHandler used to communicate with ArcGISPortal.
+        ///     This cannot be set at the same time as BackchannelCertificateValidator unless the value
+        ///     can be downcast to a WebRequestHandler.
+        /// </summary>
+        public HttpMessageHandler BackchannelHttpHandler { get; set; }
+
+        /// <summary>
+        ///     Gets or sets timeout value in milliseconds for back channel communications with ArcGISPortal.
+        /// </summary>
+        /// <value>
+        ///     The back channel timeout in milliseconds.
+        /// </value>
+        public TimeSpan BackchannelTimeout { get; set; }
+
+        /// <summary>
+        ///     The request path within the application's base path where the user-agent will be returned.
+        ///     The middleware will process this request when it arrives.
+        ///     Default value is "/signin-ArcGISPortal".
+        /// </summary>
+        public PathString CallbackPath { get; set; }
+
+        /// <summary>
+        ///     Get or sets the text that the user can display on a sign in user interface.
+        /// </summary>
+        public string Caption
+        {
+            get { return Description.Caption; }
+            set { Description.Caption = value; }
+        }
+
+        /// <summary>
+        ///     Gets or sets the ArcGIS Portal Authentication Type Name
+        ///     Displayed to the user as the login option, and allows multiple ArcGIS Portal OAuth providers to be configured for use in the same application.
+        /// </summary>
+        public string AuthenticationTypeName { get; set; }
+
+        /// <summary>
+        ///     Gets or sets the ArcGIS Portal Host (where the portal is installed e.g. https://arcgisportal.domain.com)
+        /// </summary>
+        public string Host { get; set; }
+
+        /// <summary>
+        ///     Gets or sets the ArcGISPortal supplied Client ID
+        /// </summary>
+        public string ClientId { get; set; }
+
+        /// <summary>
+        ///     Gets or sets the ArcGISPortal supplied Client Secret
+        /// </summary>
+        public string ClientSecret { get; set; }
+
+        /// <summary>
+        /// Gets the sets of OAuth endpoints used to authenticate against ArcGISPortal.  Overriding these endpoints allows you to use ArcGISPortal Enterprise for
+        /// authentication.
+        /// </summary>
+        public ArcGISPortalAuthenticationEndpoints Endpoints { get; set; }
+
+        /// <summary>
+        ///     Gets or sets the <see cref="IArcGISPortalAuthenticationProvider" /> used in the authentication events
+        /// </summary>
+        public IArcGISPortalAuthenticationProvider Provider { get; set; }
+
+        /// <summary>
+        /// A list of permissions to request.
+        /// </summary>
+        public IList<string> Scope { get; protected set; }
+
+        /// <summary>
+        ///     Gets or sets the name of another authentication middleware which will be responsible for actually issuing a user
+        ///     <see cref="System.Security.Claims.ClaimsIdentity" />.
+        /// </summary>
+        public string SignInAsAuthenticationType { get; set; }
+
+        /// <summary>
+        ///     Gets or sets the type used to secure data handled by the middleware.
+        /// </summary>
+        public ISecureDataFormat<AuthenticationProperties> StateDataFormat { get; set; }
+
+        /// <summary>
+        ///     Initializes a new <see cref="ArcGISPortalAuthenticationOptions" />
+        /// </summary>
+        public ArcGISPortalAuthenticationOptions(string host, string clientId, string clientSecret) : this(AuthenticationTypeNameDefault, host, clientId, clientSecret) {}
+
+        /// <summary>
+        ///     Initializes a new <see cref="ArcGISPortalAuthenticationOptions" />
+        /// </summary>
+        public ArcGISPortalAuthenticationOptions(string authenticationTypeName, string host, string clientId, string clientSecret) : base(authenticationTypeName)
+        {
+            AuthenticationTypeName = authenticationTypeName;
+            Host = host;
+            ClientId = clientId;
+            ClientSecret = clientSecret;
+
+            AuthenticationType = AuthenticationTypeName;
+            Caption = AuthenticationTypeName;
+
+            CallbackPath = new PathString("/signin-arcgis-portal");
+            AuthenticationMode = AuthenticationMode.Passive;
+            Scope = new List<string>
+            {
+                "code"
+            };
+            BackchannelTimeout = TimeSpan.FromSeconds(60);
+
+            Uri hostUri = new Uri(Host);
+            Endpoints = new ArcGISPortalAuthenticationEndpoints
+            {
+                AuthorizationEndpoint = new Uri(hostUri, AuthorizationEndPoint).ToString(),
+                TokenEndpoint = new Uri(hostUri, TokenEndpoint).ToString(),
+                UserInfoEndpoint = new Uri(hostUri, UserInfoEndpoint).ToString()
+            };
+        }
+    }
+}
--- a/src/Owin.Security.Providers.ArcGISPortal/Owin.Security.Providers.ArcGISPortal.csproj
+++ b/src/Owin.Security.Providers.ArcGISPortal/Owin.Security.Providers.ArcGISPortal.csproj
@@ -0,0 +1,82 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{18547CA4-D7D3-43C2-81C2-A21FC8151A93}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Owin.Security.Providers.ArcGISPortal</RootNamespace>
+    <AssemblyName>Owin.Security.Providers.ArcGISPortal</AssemblyName>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.Owin.3.0.1\lib\net45\Microsoft.Owin.dll</HintPath>
+    </Reference>
+    <Reference Include="Microsoft.Owin.Security, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Microsoft.Owin.Security.3.0.1\lib\net45\Microsoft.Owin.Security.dll</HintPath>
+    </Reference>
+    <Reference Include="Newtonsoft.Json, Version=8.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Newtonsoft.Json.8.0.3\lib\net45\Newtonsoft.Json.dll</HintPath>
+    </Reference>
+    <Reference Include="Owin, Version=1.0.0.0, Culture=neutral, PublicKeyToken=f0ebd12fd5e55cc5, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\Owin.1.0\lib\net40\Owin.dll</HintPath>
+    </Reference>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Net.Http.WebRequest" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="ArcGISPortalAuthenticationHandler.cs" />
+    <Compile Include="ArcGISPortalAuthenticationExtensions.cs" />
+    <Compile Include="ArcGISPortalAuthenticationMiddleware.cs" />
+    <Compile Include="ArcGISPortalAuthenticationOptions.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="Provider\ArcGISPortalAuthenticationProvider.cs" />
+    <Compile Include="Provider\ArcGISPortalAuthenticatedContext.cs" />
+    <Compile Include="Provider\ArcGISPortalReturnEndpointContext.cs" />
+    <Compile Include="Provider\ArcGISPortalUser.cs" />
+    <Compile Include="Provider\IArcGISPortalAuthenticationProvider.cs" />
+    <Compile Include="Resources.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DesignTime>True</DesignTime>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+  </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>
--- a/src/Owin.Security.Providers.ArcGISPortal/Properties/AssemblyInfo.cs
+++ b/src/Owin.Security.Providers.ArcGISPortal/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("Owin.Security.Providers.ArcGISPortal")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Owin.Security.Providers.ArcGISPortal")]
+[assembly: AssemblyCopyright("Copyright ©  2017")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("18547ca4-d7d3-43c2-81c2-a21fc8151a93")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
--- a/src/Owin.Security.Providers.ArcGISPortal/Provider/ArcGISPortalAuthenticatedContext.cs
+++ b/src/Owin.Security.Providers.ArcGISPortal/Provider/ArcGISPortalAuthenticatedContext.cs
@@ -0,0 +1,81 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
+
+using System.Security.Claims;
+using Microsoft.Owin;
+using Microsoft.Owin.Security;
+using Microsoft.Owin.Security.Provider;
+using Owin.Security.Providers.ArcGISPortal.Provider;
+using System;
+
+namespace Owin.Security.Providers.ArcGISPortal
+{
+    /// <summary>
+    /// Contains information about the login session as well as the user <see cref="System.Security.Claims.ClaimsIdentity"/>.
+    /// </summary>
+    public class ArcGISPortalAuthenticatedContext : BaseContext
+    {
+        /// <summary>
+        /// Initializes a <see cref="ArcGISPortalAuthenticatedContext"/>
+        /// </summary>
+        /// <param name="context">The OWIN environment</param>
+        /// <param name="user">The ArcGIS Portal user</param>
+        /// <param name="accessToken">ArcGIS Portal Access token</param>
+        /// <param name="refreshToken">ArcGIS Portal Refresh token</param>
+        /// <param name="host">ArcGIS Portal Host</param>
+        public ArcGISPortalAuthenticatedContext(IOwinContext context, ArcGISPortalUser user, string accessToken, string refreshToken, string host)
+            : base(context)
+        {
+            Uri hostUri = new Uri(host);
+
+            AccessToken = accessToken;
+            RefreshToken = refreshToken;
+            Id = user.Username;
+            Name = user.FullName;
+            Link = new Uri(hostUri, "arcgis/sharing/rest/community/users/" + Id).ToString();
+            UserName = Id;
+            Email = user.Email;
+        }
+
+        /// <summary>
+        /// Gets the ArcGIS Portal access token
+        /// </summary>
+        public string AccessToken { get; private set; }
+
+        /// <summary>
+        /// Gets the ArcGIS Portal refresh token
+        /// </summary>
+        public string RefreshToken { get; private set; }
+
+        /// <summary>
+        /// Gets the ArcGIS Portal user ID
+        /// </summary>
+        public string Id { get; }
+
+        /// <summary>
+        /// Gets the user's name
+        /// </summary>
+        public string Name { get; private set; }
+
+        /// <summary>
+        /// Gets the user's email
+        /// </summary>
+        public string Email { get; private set; }
+
+        public string Link { get; private set; }
+
+        /// <summary>
+        /// Gets the ArcGIS Portal username
+        /// </summary>
+        public string UserName { get; private set; }
+
+        /// <summary>
+        /// Gets the <see cref="ClaimsIdentity"/> representing the user
+        /// </summary>
+        public ClaimsIdentity Identity { get; set; }
+
+        /// <summary>
+        /// Gets or sets a property bag for common authentication properties
+        /// </summary>
+        public AuthenticationProperties Properties { get; set; }
+    }
+}
--- a/src/Owin.Security.Providers.ArcGISPortal/Provider/ArcGISPortalAuthenticationProvider.cs
+++ b/src/Owin.Security.Providers.ArcGISPortal/Provider/ArcGISPortalAuthenticationProvider.cs
@@ -0,0 +1,50 @@
+using System;
+using System.Threading.Tasks;
+
+namespace Owin.Security.Providers.ArcGISPortal
+{
+    /// <summary>
+    /// Default <see cref="IArcGISPortalAuthenticationProvider"/> implementation.
+    /// </summary>
+    public class ArcGISPortalAuthenticationProvider : IArcGISPortalAuthenticationProvider
+    {
+        /// <summary>
+        /// Initializes a <see cref="ArcGISPortalAuthenticationProvider"/>
+        /// </summary>
+        public ArcGISPortalAuthenticationProvider()
+        {
+            OnAuthenticated = context => Task.FromResult<object>(null);
+            OnReturnEndpoint = context => Task.FromResult<object>(null);
+        }
+
+        /// <summary>
+        /// Gets or sets the function that is invoked when the Authenticated method is invoked.
+        /// </summary>
+        public Func<ArcGISPortalAuthenticatedContext, Task> OnAuthenticated { get; set; }
+
+        /// <summary>
+        /// Gets or sets the function that is invoked when the ReturnEndpoint method is invoked.
+        /// </summary>
+        public Func<ArcGISPortalReturnEndpointContext, Task> OnReturnEndpoint { get; set; }
+
+        /// <summary>
+        /// Invoked whenever ArcGISPortal successfully authenticates a user
+        /// </summary>
+        /// <param name="context">Contains information about the login session as well as the user <see cref="System.Security.Claims.ClaimsIdentity"/>.</param>
+        /// <returns>A <see cref="Task"/> representing the completed operation.</returns>
+        public virtual Task Authenticated(ArcGISPortalAuthenticatedContext context)
+        {
+            return OnAuthenticated(context);
+        }
+
+        /// <summary>
+        /// Invoked prior to the <see cref="System.Security.Claims.ClaimsIdentity"/> being saved in a local cookie and the browser being redirected to the originally requested URL.
+        /// </summary>
+        /// <param name="context"></param>
+        /// <returns>A <see cref="Task"/> representing the completed operation.</returns>
+        public virtual Task ReturnEndpoint(ArcGISPortalReturnEndpointContext context)
+        {
+            return OnReturnEndpoint(context);
+        }
+    }
+}
--- a/src/Owin.Security.Providers.ArcGISPortal/Provider/ArcGISPortalReturnEndpointContext.cs
+++ b/src/Owin.Security.Providers.ArcGISPortal/Provider/ArcGISPortalReturnEndpointContext.cs
@@ -0,0 +1,26 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
+
+using Microsoft.Owin;
+using Microsoft.Owin.Security;
+using Microsoft.Owin.Security.Provider;
+
+namespace Owin.Security.Providers.ArcGISPortal
+{
+    /// <summary>
+    /// Provides context information to middleware providers.
+    /// </summary>
+    public class ArcGISPortalReturnEndpointContext : ReturnEndpointContext
+    {
+        /// <summary>
+        ///
+        /// </summary>
+        /// <param name="context">OWIN environment</param>
+        /// <param name="ticket">The authentication ticket</param>
+        public ArcGISPortalReturnEndpointContext(
+            IOwinContext context,
+            AuthenticationTicket ticket)
+            : base(context, ticket)
+        {
+        }
+    }
+}
--- a/src/Owin.Security.Providers.ArcGISPortal/Provider/ArcGISPortalUser.cs
+++ b/src/Owin.Security.Providers.ArcGISPortal/Provider/ArcGISPortalUser.cs
@@ -0,0 +1,9 @@
+namespace Owin.Security.Providers.ArcGISPortal.Provider
+{
+    public class ArcGISPortalUser
+    {
+        public string Username { get; set; }
+        public string FullName { get; set; }
+        public string Email { get; set; }
+    }
+}
--- a/src/Owin.Security.Providers.ArcGISPortal/Provider/IArcGISPortalAuthenticationProvider.cs
+++ b/src/Owin.Security.Providers.ArcGISPortal/Provider/IArcGISPortalAuthenticationProvider.cs
@@ -0,0 +1,24 @@
+using System.Threading.Tasks;
+
+namespace Owin.Security.Providers.ArcGISPortal
+{
+    /// <summary>
+    /// Specifies callback methods which the <see cref="ArcGISPortalAuthenticationMiddleware"></see> invokes to enable developer control over the authentication process. />
+    /// </summary>
+    public interface IArcGISPortalAuthenticationProvider
+    {
+        /// <summary>
+        /// Invoked whenever ArcGISPortal successfully authenticates a user
+        /// </summary>
+        /// <param name="context">Contains information about the login session as well as the user <see cref="System.Security.Claims.ClaimsIdentity"/>.</param>
+        /// <returns>A <see cref="Task"/> representing the completed operation.</returns>
+        Task Authenticated(ArcGISPortalAuthenticatedContext context);
+
+        /// <summary>
+        /// Invoked prior to the <see cref="System.Security.Claims.ClaimsIdentity"/> being saved in a local cookie and the browser being redirected to the originally requested URL.
+        /// </summary>
+        /// <param name="context"></param>
+        /// <returns>A <see cref="Task"/> representing the completed operation.</returns>
+        Task ReturnEndpoint(ArcGISPortalReturnEndpointContext context);
+    }
+}
--- a/src/Owin.Security.Providers.ArcGISPortal/Resources.Designer.cs
+++ b/src/Owin.Security.Providers.ArcGISPortal/Resources.Designer.cs
@@ -0,0 +1,81 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace Owin.Security.Providers.ArcGISPortal {
+    using System;
+    
+    
+    /// <summary>
+    ///   A strongly-typed resource class, for looking up localized strings, etc.
+    /// </summary>
+    // This class was auto-generated by the StronglyTypedResourceBuilder
+    // class via a tool like ResGen or Visual Studio.
+    // To add or remove a member, edit your .ResX file then rerun ResGen
+    // with the /str option, or rebuild your VS project.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "15.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources {
+        
+        private static global::System.Resources.ResourceManager resourceMan;
+        
+        private static global::System.Globalization.CultureInfo resourceCulture;
+        
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources() {
+        }
+        
+        /// <summary>
+        ///   Returns the cached ResourceManager instance used by this class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager {
+            get {
+                if (object.ReferenceEquals(resourceMan, null)) {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("Owin.Security.Providers.ArcGISPortal.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+        
+        /// <summary>
+        ///   Overrides the current thread's CurrentUICulture property for all
+        ///   resource lookups using this strongly typed resource class.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture {
+            get {
+                return resourceCulture;
+            }
+            set {
+                resourceCulture = value;
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to The &apos;{0}&apos; option must be provided..
+        /// </summary>
+        internal static string Exception_OptionMustBeProvided {
+            get {
+                return ResourceManager.GetString("Exception_OptionMustBeProvided", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to An ICertificateValidator cannot be specified at the same time as an HttpMessageHandler unless it is a WebRequestHandler..
+        /// </summary>
+        internal static string Exception_ValidatorHandlerMismatch {
+            get {
+                return ResourceManager.GetString("Exception_ValidatorHandlerMismatch", resourceCulture);
+            }
+        }
+    }
+}
--- a/src/Owin.Security.Providers.ArcGISPortal/Resources.resx
+++ b/src/Owin.Security.Providers.ArcGISPortal/Resources.resx
@@ -0,0 +1,126 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <data name="Exception_OptionMustBeProvided" xml:space="preserve">
+    <value>The '{0}' option must be provided.</value>
+  </data>
+  <data name="Exception_ValidatorHandlerMismatch" xml:space="preserve">
+    <value>An ICertificateValidator cannot be specified at the same time as an HttpMessageHandler unless it is a WebRequestHandler.</value>
+  </data>
+</root>
--- a/src/Owin.Security.Providers.ArcGISPortal/packages.config
+++ b/src/Owin.Security.Providers.ArcGISPortal/packages.config
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Microsoft.Owin" version="3.0.1" targetFramework="net45" />
+  <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net45" />
+  <package id="Newtonsoft.Json" version="8.0.3" targetFramework="net45" />
+  <package id="Owin" version="1.0" targetFramework="net45" />
+</packages>
--- a/src/Owin.Security.Providers.Asana/Owin.Security.Providers.Asana.csproj
+++ b/src/Owin.Security.Providers.Asana/Owin.Security.Providers.Asana.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Backlog/Owin.Security.Providers.Backlog.csproj
+++ b/src/Owin.Security.Providers.Backlog/Owin.Security.Providers.Backlog.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Baidu/Owin.Security.Providers.Baidu.csproj
+++ b/src/Owin.Security.Providers.Baidu/Owin.Security.Providers.Baidu.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.BattleNet/Owin.Security.Providers.BattleNet.csproj
+++ b/src/Owin.Security.Providers.BattleNet/Owin.Security.Providers.BattleNet.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Bitbucket/Owin.Security.Providers.Bitbucket.csproj
+++ b/src/Owin.Security.Providers.Bitbucket/Owin.Security.Providers.Bitbucket.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Box/Owin.Security.Providers.Box.csproj
+++ b/src/Owin.Security.Providers.Box/Owin.Security.Providers.Box.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Buffer/Owin.Security.Providers.Buffer.csproj
+++ b/src/Owin.Security.Providers.Buffer/Owin.Security.Providers.Buffer.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Cosign/Owin.Security.Providers.Cosign.csproj
+++ b/src/Owin.Security.Providers.Cosign/Owin.Security.Providers.Cosign.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.DeviantArt/Owin.Security.Providers.DeviantArt.csproj
+++ b/src/Owin.Security.Providers.DeviantArt/Owin.Security.Providers.DeviantArt.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Discord/Owin.Security.Providers.Discord.csproj
+++ b/src/Owin.Security.Providers.Discord/Owin.Security.Providers.Discord.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.DoYouBuzz/Owin.Security.Providers.DoYouBuzz.csproj
+++ b/src/Owin.Security.Providers.DoYouBuzz/Owin.Security.Providers.DoYouBuzz.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Dropbox/Owin.Security.Providers.Dropbox.csproj
+++ b/src/Owin.Security.Providers.Dropbox/Owin.Security.Providers.Dropbox.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.EVEOnline/Owin.Security.Providers.EVEOnline.csproj
+++ b/src/Owin.Security.Providers.EVEOnline/Owin.Security.Providers.EVEOnline.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Evernote/Owin.Security.Providers.Evernote.csproj
+++ b/src/Owin.Security.Providers.Evernote/Owin.Security.Providers.Evernote.csproj
@@ -21,6 +21,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -29,6 +30,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Accessibility" />
--- a/src/Owin.Security.Providers.Fitbit/Owin.Security.Providers.Fitbit.csproj
+++ b/src/Owin.Security.Providers.Fitbit/Owin.Security.Providers.Fitbit.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Flickr/Owin.Security.Providers.Flickr.csproj
+++ b/src/Owin.Security.Providers.Flickr/Owin.Security.Providers.Flickr.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Foursquare/Owin.Security.Providers.Foursquare.csproj
+++ b/src/Owin.Security.Providers.Foursquare/Owin.Security.Providers.Foursquare.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Geni/Owin.Security.Providers.Geni.csproj
+++ b/src/Owin.Security.Providers.Geni/Owin.Security.Providers.Geni.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.GitHub/Owin.Security.Providers.GitHub.csproj
+++ b/src/Owin.Security.Providers.GitHub/Owin.Security.Providers.GitHub.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Gitter/Owin.Security.Providers.Gitter.csproj
+++ b/src/Owin.Security.Providers.Gitter/Owin.Security.Providers.Gitter.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.GooglePlus/Owin.Security.Providers.GooglePlus.csproj
+++ b/src/Owin.Security.Providers.GooglePlus/Owin.Security.Providers.GooglePlus.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.HealthGraph/Owin.Security.Providers.HealthGraph.csproj
+++ b/src/Owin.Security.Providers.HealthGraph/Owin.Security.Providers.HealthGraph.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Imgur/Owin.Security.Providers.Imgur.csproj
+++ b/src/Owin.Security.Providers.Imgur/Owin.Security.Providers.Imgur.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Instagram/Owin.Security.Providers.Instagram.csproj
+++ b/src/Owin.Security.Providers.Instagram/Owin.Security.Providers.Instagram.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.LinkedIn/Owin.Security.Providers.LinkedIn.csproj
+++ b/src/Owin.Security.Providers.LinkedIn/Owin.Security.Providers.LinkedIn.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.MyHeritage/Owin.Security.Providers.MyHeritage.csproj
+++ b/src/Owin.Security.Providers.MyHeritage/Owin.Security.Providers.MyHeritage.csproj
@@ -21,6 +21,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -29,6 +30,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Onshape/Owin.Security.Providers.Onshape.csproj
+++ b/src/Owin.Security.Providers.Onshape/Owin.Security.Providers.Onshape.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.OpenID/Owin.Security.Providers.OpenID.csproj
+++ b/src/Owin.Security.Providers.OpenID/Owin.Security.Providers.OpenID.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Orcid/Owin.Security.Providers.Orcid.csproj
+++ b/src/Owin.Security.Providers.Orcid/Owin.Security.Providers.Orcid.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.PayPal/Owin.Security.Providers.PayPal.csproj
+++ b/src/Owin.Security.Providers.PayPal/Owin.Security.Providers.PayPal.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Podbean/Owin.Security.Providers.Podbean.csproj
+++ b/src/Owin.Security.Providers.Podbean/Owin.Security.Providers.Podbean.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Reddit/Owin.Security.Providers.Reddit.csproj
+++ b/src/Owin.Security.Providers.Reddit/Owin.Security.Providers.Reddit.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Salesforce/Constants.cs
+++ b/src/Owin.Security.Providers.Salesforce/Constants.cs
@@ -1,7 +1,11 @@
 namespace Owin.Security.Providers.Salesforce
 {
-    internal static class Constants
+    public static class Constants
    {
        public const string DefaultAuthenticationType = "Salesforce";
+
+        public const string EnvironmentAuthenticationProperty = "Environment";
+        public const string ProductionEnvironment = "Production";
+        public const string SandboxEnvironment = "Sandbox";
    }
 }
--- a/src/Owin.Security.Providers.Salesforce/Owin.Security.Providers.Salesforce.csproj
+++ b/src/Owin.Security.Providers.Salesforce/Owin.Security.Providers.Salesforce.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Salesforce/SalesforceAuthenticationHandler.cs
+++ b/src/Owin.Security.Providers.Salesforce/SalesforceAuthenticationHandler.cs
@@ -18,6 +18,12 @@ namespace Owin.Security.Providers.Salesforce
    {
        private const string XmlSchemaString = "http://www.w3.org/2001/XMLSchema#string";

+        private const string ProductionHost =    "https://login.salesforce.com";
+        private const string SandboxHost =       "https://test.salesforce.com";
+
+        private const string AuthorizationEndpoint = "/services/oauth2/authorize";
+        private const string TokenEndpoint =     "/services/oauth2/token";
+
        private readonly ILogger _logger;
        private readonly HttpClient _httpClient;

@@ -74,7 +80,7 @@ namespace Owin.Security.Providers.Salesforce
                    };

                // Request the token
-                var requestMessage = new HttpRequestMessage(HttpMethod.Post, Options.Endpoints.TokenEndpoint);
+                var requestMessage = new HttpRequestMessage(HttpMethod.Post, ComposeTokenEndpoint(properties));
                requestMessage.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                requestMessage.Content = new FormUrlEncodedContent(body);
                var tokenResponse = await _httpClient.SendAsync(requestMessage);
@@ -186,8 +192,10 @@ namespace Owin.Security.Providers.Salesforce

            var state = Options.StateDataFormat.Protect(properties);

-            var authorizationEndpoint =
-                $"{Options.Endpoints.AuthorizationEndpoint}?response_type={"code"}&client_id={Options.ClientId}&redirect_uri={HttpUtility.UrlEncode(redirectUri)}&display={"page"}&immediate={false}&state={Uri.EscapeDataString(state)}";
+            var authorizationEndpoint = ComposeAuthorizationEndpoint(properties);
+
+            authorizationEndpoint =
+                $"{authorizationEndpoint}?response_type={"code"}&client_id={Options.ClientId}&redirect_uri={HttpUtility.UrlEncode(redirectUri)}&display={"page"}&immediate={false}&state={Uri.EscapeDataString(state)}";

            if (Options.Scope != null && Options.Scope.Count > 0)
            {
@@ -253,5 +261,66 @@ namespace Owin.Security.Providers.Salesforce

            return context.IsRequestCompleted;
        }
+
+        private string ComposeAuthorizationEndpoint(AuthenticationProperties properties) {
+            string endpointPath = AuthorizationEndpoint;
+
+            string endpoint =
+                !String.IsNullOrEmpty(Options.Endpoints.AuthorizationEndpoint) ?
+                Options.Endpoints.AuthorizationEndpoint :
+                ComposeEndpoint(properties, endpointPath);
+
+            // if AuthenticationProperties for this session specifies an environment property
+            // it should take precedence over the value in AuthenticationOptions
+            string environmentProperty = null;
+            if (properties.Dictionary.TryGetValue(Constants.EnvironmentAuthenticationProperty, out environmentProperty)) {
+                endpoint =
+                    environmentProperty == Constants.SandboxEnvironment ?
+                    SandboxHost + endpointPath :
+                    ProductionHost + endpointPath;
+            }
+
+            return endpoint;
+        }
+
+        private string ComposeTokenEndpoint(AuthenticationProperties properties) {
+            string endpointPath = TokenEndpoint;
+
+            string endpoint =
+                !String.IsNullOrEmpty(Options.Endpoints.TokenEndpoint) ?
+                Options.Endpoints.TokenEndpoint :
+                ComposeEndpoint(properties, endpointPath);
+
+            // if AuthenticationProperties for this session specifies an environment property
+            // it should take precedence over the value in AuthenticationOptions
+            string environmentProperty = null; ;
+            if (properties.Dictionary.TryGetValue(Constants.EnvironmentAuthenticationProperty, out environmentProperty)) {
+                endpoint =
+                    environmentProperty == Constants.SandboxEnvironment ?
+                    SandboxHost + endpointPath :
+                    ProductionHost + endpointPath;
+            }
+
+            return endpoint;
+        }
+
+        private string ComposeEndpoint(AuthenticationProperties properties, string endpointPath) {
+            string endpoint =
+                !String.IsNullOrEmpty(Options.Endpoints.Environment) && Options.Endpoints.Environment == Constants.SandboxEnvironment ?
+                SandboxHost + endpointPath :
+                ProductionHost + endpointPath;
+
+            // if AuthenticationProperties for this session specifies an environment property
+            // it should take precedence over the value in AuthenticationOptions
+            string environmentProperty = null; ;
+            if (properties.Dictionary.TryGetValue(Constants.EnvironmentAuthenticationProperty, out environmentProperty)) {
+                endpoint =
+                    environmentProperty == Constants.SandboxEnvironment ?
+                    SandboxHost + endpointPath :
+                    ProductionHost + endpointPath;
+            }
+
+            return endpoint;
+        }
    }
 }
--- a/src/Owin.Security.Providers.Salesforce/SalesforceAuthenticationOptions.cs
+++ b/src/Owin.Security.Providers.Salesforce/SalesforceAuthenticationOptions.cs
@@ -19,10 +19,12 @@ namespace Owin.Security.Providers.Salesforce
            /// Endpoint which is used to exchange code for access token
            /// </summary>
            public string TokenEndpoint { get; set; }
-        }

-        private const string AuthorizationEndPoint = "";
-        private const string TokenEndpoint = "";
+            /// <summary>
+            /// Production or Sandbox. Use Constants.ProductionEnvironment or Constants.SandboxEnvironment
+            /// </summary>
+            public string Environment { get; set; }
+        }

        /// <summary>
        ///     Gets or sets the a pinned certificate validator to use to validate the endpoints used
@@ -79,8 +81,8 @@ namespace Owin.Security.Providers.Salesforce
        public string ClientSecret { get; set; }

        /// <summary>
-        /// Gets the sets of OAuth endpoints used to authenticate against Salesforce.  Overriding these endpoints allows you to use Salesforce Enterprise for
-        /// authentication.
+        /// Gets the sets of OAuth endpoints used to authenticate against Salesforce.  
+        /// Overriding these endpoints allows you to use Salesforce Enterprise for authentication.
        /// </summary>
        public SalesforceAuthenticationEndpoints Endpoints { get; set; }

@@ -127,8 +129,8 @@ namespace Owin.Security.Providers.Salesforce
            BackchannelTimeout = TimeSpan.FromSeconds(60);
            Endpoints = new SalesforceAuthenticationEndpoints
            {
-                AuthorizationEndpoint = AuthorizationEndPoint,
-                TokenEndpoint = TokenEndpoint
+                AuthorizationEndpoint = null,
+                TokenEndpoint = null
            };
        }
    }
--- a/src/Owin.Security.Providers.Shopify/Owin.Security.Providers.Shopify.csproj
+++ b/src/Owin.Security.Providers.Shopify/Owin.Security.Providers.Shopify.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.SlackProvider/Owin.Security.Providers.SlackProvider.csproj
+++ b/src/Owin.Security.Providers.SlackProvider/Owin.Security.Providers.SlackProvider.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.SoundCloud/Owin.Security.Providers.SoundCloud.csproj
+++ b/src/Owin.Security.Providers.SoundCloud/Owin.Security.Providers.SoundCloud.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Spotify/Owin.Security.Providers.Spotify.csproj
+++ b/src/Owin.Security.Providers.Spotify/Owin.Security.Providers.Spotify.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.StackExchange/Owin.Security.Providers.StackExchange.csproj
+++ b/src/Owin.Security.Providers.StackExchange/Owin.Security.Providers.StackExchange.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Steam/Owin.Security.Providers.Steam.csproj
+++ b/src/Owin.Security.Providers.Steam/Owin.Security.Providers.Steam.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.TripIt/Owin.Security.Providers.TripIt.csproj
+++ b/src/Owin.Security.Providers.TripIt/Owin.Security.Providers.TripIt.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Twitch/Owin.Security.Providers.Twitch.csproj
+++ b/src/Owin.Security.Providers.Twitch/Owin.Security.Providers.Twitch.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Untappd/Owin.Security.Providers.Untappd.csproj
+++ b/src/Owin.Security.Providers.Untappd/Owin.Security.Providers.Untappd.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.VKontakte/Owin.Security.Providers.VKontakte.csproj
+++ b/src/Owin.Security.Providers.VKontakte/Owin.Security.Providers.VKontakte.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Vimeo/Owin.Security.Providers.Vimeo.csproj
+++ b/src/Owin.Security.Providers.Vimeo/Owin.Security.Providers.Vimeo.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.VisualStudio/Owin.Security.Providers.VisualStudio.csproj
+++ b/src/Owin.Security.Providers.VisualStudio/Owin.Security.Providers.VisualStudio.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.WSO2/Owin.Security.Providers.WSO2.csproj
+++ b/src/Owin.Security.Providers.WSO2/Owin.Security.Providers.WSO2.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Wargaming/Owin.Security.Providers.Wargaming.csproj
+++ b/src/Owin.Security.Providers.Wargaming/Owin.Security.Providers.Wargaming.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.WordPress/Owin.Security.Providers.WordPress.csproj
+++ b/src/Owin.Security.Providers.WordPress/Owin.Security.Providers.WordPress.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Xing/Owin.Security.Providers.Xing.csproj
+++ b/src/Owin.Security.Providers.Xing/Owin.Security.Providers.Xing.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Yahoo/Owin.Security.Providers.Yahoo.csproj
+++ b/src/Owin.Security.Providers.Yahoo/Owin.Security.Providers.Yahoo.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
--- a/src/Owin.Security.Providers.Yammer/Owin.Security.Providers.Yammer.csproj
+++ b/src/Owin.Security.Providers.Yammer/Owin.Security.Providers.Yammer.csproj
@@ -20,6 +20,7 @@
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
@@ -28,6 +29,7 @@
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="Microsoft.Owin, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
Author	SHA1	Message	Date
Tommy Parnell	29be30bfd7	bump version	2017-12-29 01:58:14 -05:00
Tommy Parnell	b8055739ff	rm semicolon	2017-12-29 01:57:41 -05:00
Ștefan Negrițoiu	7aeca07f08	Salesforce provider: add Option to specify Production vs. Sandbox environment (#223 ) * add Option to specify Production vs. Sandbox Environment also fixes issue https://github.com/TerribleDev/OwinOAuthProviders/issues/54 * ability to specify Production vs. Sandbox environment per auth session in addition to global setting * add examples to show usage of new Production vs. Sandbox Option for Salesforce provider	2017-12-29 01:56:14 -05:00
Tommy Parnell	fde4b5ebac	fix rake	2017-12-08 11:20:09 -05:00
Tommy Parnell	d5b81fae9c	fix sln	2017-12-08 10:51:14 -05:00
Tommy Parnell	bbd9e33570	bump version	2017-12-08 10:38:01 -05:00
Gavin Harriss	7bdabb4cb7	ArcGIS Portal provider (#214 ) * ArcGIS Portal provider added Originally attempted to inherit from ArcGIS Online provider, but a fair amount of refactoring is required to allow inheritance for everything that needs changing. To be revisited when time allows.	2017-12-08 10:37:16 -05:00
KB	91dbf99949	Change LangVersion to 6. #217 (#221 )	2017-12-01 17:22:30 -05:00