create special directory

Author: twsouthwick

src/Microsoft.Extensions.ServiceDiscovery.Abstractions/FrameworkExtensions.Shared.cs

@@ -22,5 +22,7 @@
   <ItemGroup Condition=" '$(TargetFramework)' == 'net462' ">
     <PackageReference Include="Microsoft.Bcl.Memory" /> 
   </ItemGroup>
+  
+  <Import Project="$(SharedDir)FxPolyfills\FxPolyfills.targets" />
 
 </Project>

src/Microsoft.Extensions.ServiceDiscovery.Abstractions/Microsoft.Extensions.ServiceDiscovery.Abstractions.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>$(DefaultTargetFramework);net462</TargetFrameworks>
@@ -8,10 +8,6 @@
     <PackageIconFullPath>$(DefaultDotnetIconFullPath)</PackageIconFullPath>
   </PropertyGroup>
 
-  <ItemGroup>
-    <Compile Include="..\Microsoft.Extensions.ServiceDiscovery.Abstractions\FrameworkExtensions.Shared.cs" Link="FrameworkExtensions.Shared.cs" />
-  </ItemGroup>
-
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Http" />
     <InternalsVisibleTo Include="Microsoft.Extensions.ServiceDiscovery.Tests" />
@@ -24,11 +20,8 @@
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net462' ">
     <PackageReference Include="Microsoft.Bcl.TimeProvider" />
-
-    <Reference Include="System.Net.Http" />
-
-    <Using Include="System.Net.Http" />
-    <Using Include="System.Threading.Tasks" />
   </ItemGroup>
 
+  <Import Project="$(SharedDir)FxPolyfills\FxPolyfills.targets" />
+
 </Project>

src/Microsoft.Extensions.ServiceDiscovery/FrameworkExtensions.cs

@@ -0,0 +1,32 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+#if NETFRAMEWORK
+
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.CompilerServices;
+
+namespace System;
+
+internal static partial class FxPolyfillArgumentException
+{
+    extension(ArgumentException)
+    {
+        public static void ThrowIfNullOrEmpty([NotNull] string? argument, [CallerArgumentExpression(nameof(argument))] string? paramName = null)
+        {
+            if (string.IsNullOrEmpty(argument))
+            {
+                ThrowNullOrEmptyException(argument, paramName);
+            }
+        }
+    }
+
+    [DoesNotReturn]
+    private static void ThrowNullOrEmptyException(string? argument, string? paramName)
+    {
+        ArgumentNullException.ThrowIfNull(argument, paramName);
+        throw new ArgumentException("The value cannot be an empty string.", paramName);
+    }
+}
+
+#endif

src/Microsoft.Extensions.ServiceDiscovery/Microsoft.Extensions.ServiceDiscovery.csproj

@@ -0,0 +1,28 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+#if NETFRAMEWORK
+
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.CompilerServices;
+
+namespace System;
+
+internal static partial class FxPolyfillArgumentNullException
+{
+    extension(ArgumentNullException)
+    {
+        public static void ThrowIfNull([NotNull] object? argument, [CallerArgumentExpression(nameof(argument))] string? paramName = null)
+        {
+            if (argument is null)
+            {
+                Throw(paramName);
+            }
+        }
+    }
+
+    [DoesNotReturn]
+    internal static void Throw(string? paramName) => throw new ArgumentNullException(paramName);
+}
+
+#endif