System.Net.Http and System.IO.Compression .NET Standard facades need to be included when targeting .NET 4.7.1

.NET 4.7.1 ships with support for the .NET Standard 2.0 APIs, as well as the necessary facades. So it’s not supposed to need any facades injected by the ImplicitlyExpandNETStandardFacades target.

However, the in-box assembly versions of System.Net.Http and System.IO.Compression are less than the OOB and facade versions of those libraries. This will be fixed in .NET 4.7.2, however for 4.7.1, we still need to inject just those two facades as necessary.

[steevcoco]

Hi. I have had trouble getting a project working for reasons surrounding these binding issues. I wanted to add a comment now that the project seems to work: it was not simple to get it working, and I had to find the right recipe.

• It is Framework 4.7.1.
  • References a NetStandard 2.0 project.
    • That one references NuGet System.Configuration.ConfigurationManager 4.4.1

VS would not build, and eventually I get “you need to reference System.Configuration.ConfigurationManager 4.0.0.0”. — Version is interesting?

When I add to the Framework project, NuGet ConfigurationManager 4.4.1, that project file now contains:

<Reference Include="System.Configuration.ConfigurationManager, Version=4.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
  <HintPath>..\..\..\..\..\packages\System.Configuration.ConfigurationManager.4.4.1\lib\net461\System.Configuration.ConfigurationManager.dll</HintPath>
</Reference>

… Which are odd version numbers?

Eventually I had to also add

<AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>

And now it is working. And there is another similar thing in the same project:

• This Framework 4.7.1.
  • References a NetStandard 2.0 project.
    • That one references System.ComponentModel.Annotations 4.4.1

… And I added NuGet System.ComponentModel.Annotations 4.4.1. And the Framework project file now contains:

<Reference Include="System.ComponentModel.Annotations, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
  <HintPath>..\..\..\..\..\packages\System.ComponentModel.Annotations.4.4.1\lib\net461\System.ComponentModel.Annotations.dll</HintPath>
</Reference>

I just wanted to add a comment because it was not simple to get it working: if you do or don’t add the AutoGenerateBindingRedirects, and do or don’t add the NuGet references, you get different failures, and different suggestions. I had to come to this recipe to see it working.

[livarcocc]

@eriawan VS 15.6. SDK will be 2.1.100.