init

Program.fs

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+// Learn more about F# at http://fsharp.org
+
+open System
+open Newtonsoft.Json
+open System.Xml
+open System.IO
+type Tommy  = 
+    {
+        mutable Name: string
+        mutable Age: int
+    }
+type Step() =
+    member val Name = "" with get,set
+    member val Age = 0 with get,set
+
+    // {
+    //     mutable Name: string
+    //     mutable Desc: string
+    // }
+
+[<EntryPoint>]
+let main argv =
+    let xml = "                        <Step>
+                            <Name>Tommy</Name>
+                            <Age>27</Age>
+                        </Step>"
+    let serializer = System.Xml.Serialization.XmlSerializer(typeof<Step>);
+    use memory = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(xml))
+    let rez = (serializer.Deserialize(memory) :?> Step)
+    printf "my name is %s and I'm %i" rez.Name rez.Age
+    let result = JsonConvert.DeserializeObject<Tommy>("{\"Name\": \"Tommy Parnell\", \"Age\": 27}")
+    if isNull(box result)
+    then 
+        Console.WriteLine "its null"
+    else
+        printfn "my name is %s and my age is %i" result.Name result.Age
+    0 // return an integer exit code

fjson.fsproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.0</TargetFramework>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="Program.fs" />
+  </ItemGroup>
+  <ItemGroup>
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="newtonsoft.json" Version="10.0.3" />
+  </ItemGroup>
+</Project>