Change LangVersion to 6. #217 (#221)

2017-12-01 17:22:30 -05:00
parent b4bd9587dc
commit 91dbf99949
54 changed files with 108 additions and 0 deletions
--- 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">
--- 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/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.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/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.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>
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  <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>
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  <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>
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  <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>
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  <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">