Add net462 target to GXOData.Client.All for .NET Framework consumers (#11)

The 6.0-GX line resynced with upstream simple-odata-client, which dropped
the net4x target and now ships only net8.0/net7.0/netstandard2.0. As a
result, .NET Framework consumers (notably GeneXus-generated KBs built with
the legacy v4.0.30319 MSBuild) resolve the netstandard2.0 asset, whose
public types (e.g. ODataEntry) live in a netstandard-targeted assembly.
Those projects do not pull in the netstandard.dll facade automatically, so
the C# compiler cannot resolve System.Object for those types and fails with
CS0012, cascading into CS1593 overload-resolution errors against the
GXODataClient query delegates.

Re-add a native .NET Framework asset so NuGet/the GeneXus build prefer it
over netstandard2.0 on net46x+ projects:

- GXOData.Client.All.csproj: add net462 to TargetFrameworks, plus a
  net462-only ItemGroup. net462 lacks types the netstandard2.0 sources
  assume: reference System.Net.Http (4.3.4, matching DynServiceOData),
  add System.ValueTuple (4.5.0, in-box only from net47), and import
  System.Net.Http explicitly since the SDK adds it to ImplicitUsings only
  for .NET/.NET Standard TFMs, not .NET Framework.
- GXOData.Client.nuspec: add the net462 dependency group and lib\net462
  file entries.
- Bump AssemblyVersion 6.0.2.0 -> 6.0.3.0 so a new package is published.

Verified: net462 builds clean, the full solution builds, and dotnet pack
produces a nupkg containing lib/net462/GXOData.Client.All.dll.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: claudiamurialdo

GXOData.Client.nuspec

@@ -19,6 +19,12 @@
     <language>en-us</language>
     <tags>odata data rest client netstandard net7 net8 mono android ios</tags>
     <dependencies>
+      <group targetFramework="net462">
+        <dependency id="Microsoft.Data.OData" version="[5.8.4, 6.0.0)" />
+        <dependency id="Microsoft.OData.Core" version="[7.4.4, 8.0)" />
+        <dependency id="System.Net.Http" version="4.3.4" />
+        <dependency id="System.ValueTuple" version="4.5.0" />
+      </group>
       <group targetFramework="netstandard2.0">
         <dependency id="Microsoft.Data.OData" version="[5.8.4, 6.0.0)" />
         <dependency id="Microsoft.OData.Core" version="[7.4.4, 8.0)" />
@@ -34,6 +40,10 @@
     </dependencies>
   </metadata>
   <files>
+    <!-- net462 -->
+    <file src="build\Release\GXOData.Client.All\net462\GXOData.Client.All.dll" target="lib\net462\GXOData.Client.All.dll" />
+    <file src="build\Release\GXOData.Client.All\net462\GXOData.Client.All.xml" target="lib\net462\GXOData.Client.All.xml" />
+
     <!-- netstandard2.0 -->
     <file src="build\Release\GXOData.Client.All\netstandard2.0\GXOData.Client.All.dll" target="lib\netstandard2.0\GXOData.Client.All.dll" />
     <file src="build\Release\GXOData.Client.All\netstandard2.0\GXOData.Client.All.xml" target="lib\netstandard2.0\GXOData.Client.All.xml" />

src/GXOdata.Client.All/Directory.Build.props

@@ -3,7 +3,7 @@
 	<Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Build.props', '$(MSBuildThisFileDirectory)../'))" />
 
 	<PropertyGroup>
-		<AssemblyVersion>6.0.2.0</AssemblyVersion>
+		<AssemblyVersion>6.0.3.0</AssemblyVersion>
 		<FileVersion>$(AssemblyVersion)</FileVersion>
 		<InformationalVersion>$([System.DateTime]::UtcNow.ToString("yyyyMMddHHmmss")).$(GITHUB_SHA)</InformationalVersion>
 		<Company>GeneXus</Company>

src/GXOdata.Client.All/GXOData.Client.All.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net7.0;netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>net8.0;net7.0;netstandard2.0;net462</TargetFrameworks>
     <RootNamespace>Simple.OData.Client</RootNamespace>
     <OutputPath>$(SolutionDir)/build/$(Configuration)/$(AssemblyName)/$(TargetFramework)/</OutputPath>
     <OutDir>$(OutputPath)</OutDir>
@@ -31,6 +31,17 @@
     <PackageReference Include="Microsoft.OData.Core" Version="[7.4.4, 8.0)" />
   </ItemGroup>
 
+  <!-- net462 lacks the in-box types the netstandard2.0 sources rely on:
+       System.Net.Http must be referenced explicitly, and ValueTuple<> only
+       ships in-box from net47 onward. -->
+  <ItemGroup Condition="'$(TargetFramework)' == 'net462'">
+    <PackageReference Include="System.Net.Http" Version="4.3.4" />
+    <PackageReference Include="System.ValueTuple" Version="4.5.0" />
+    <!-- The SDK adds System.Net.Http to ImplicitUsings only for .NET/.NET Standard
+         TFMs, not for .NET Framework, so import it explicitly here. -->
+    <Using Include="System.Net.Http" />
+  </ItemGroup>
+
   <ItemGroup>
     <Compile Include="..\Simple.OData.Client.Core\**\*.cs" Exclude="**\AssemblyInfo.cs;..\Simple.OData.Client.Core\obj\**" Label="Core" />
     <Compile Include="..\Simple.OData.Client.V3.Adapter\**\*.cs" Exclude="**\AssemblyInfo.cs;..\Simple.OData.Client.V3.Adapter\obj\**" Label="V3Adapter" />