Add runtime test for ThreadStatic valuetype access

src/tests/baseservices/threading/threadstatic/threadstatic08.cs

@@ -0,0 +1,38 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+using System;
+using System.IO;
+using System.Threading;
+
+public struct Struct
+{
+    public uint a;
+    public uint b;
+}
+
+public class Program
+{
+    [ThreadStatic]
+    private static Struct TSStruct;
+
+    public static int Main(string[] args)
+    {
+        if(TSStruct.a != 0 || TSStruct.b != 0)
+            return 101;
+
+        Struct str = new Struct ();
+        str.a = 0xdeadbeef;
+        str.b = 0xba5eba11;
+
+        TSStruct = str;
+        if(TSStruct.a != 0xdeadbeef || TSStruct.b != 0xba5eba11)
+            return 102;
+
+        Struct str2 = TSStruct;
+        if(str2.a != 0xdeadbeef || str2.b != 0xba5eba11)
+            return 103;
+
+        Console.WriteLine("Test Succeeded.");
+        return 100;
+    }
+}

src/tests/baseservices/threading/threadstatic/threadstatic08.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <CLRTestPriority>0</CLRTestPriority>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="threadstatic08.cs" />
+  </ItemGroup>
+</Project>