sdk: NETSDK1073 for .NET Core 2.2 | Builds Fail

Preface

I am reporting this here based on this comment from a (possibly) related issue. _Originally posted by @dsplaisted in https://github.com/dotnet/cli/issues/11378#issuecomment-539583642_

@robborden Can you open a new issue for the failures you’re encountering? The error message is the same but I don’t believe the root cause is the same as this issue which has been fixed. Thanks!

This is from the dotnet/CLI repo but when you go to create a new issue there the text reads:

PLEASE DO NOT FILE ISSUES IN THIS REPO File them in https://github.com/dotnet/sdk instead.

If this is the wrong location let me know.

Problem Description

I am using Visual Studio 2019 version 16.3.8. I have a solution with these frameworks:

• Project1 targets netcoreapp2.2
• Project2 targets netstandard2.0
• Project3 targets netcoreapp2.2
• Project4 targets netcoreapp2.2

When I rebuilt the solution I am now getting an unexpected error from each project:

“The FrameworkReference ‘.NETStandard,Version=v2.0’ was not recognized” The file referenced is Microsoft.NET.Sdk.FrameworkReferenceResolution.Targets on line 236. This points to:

<ResolveTargetingPackAssets FrameworkReferences="@(FrameworkReference)"
                                ResolvedTargetingPacks="@(ResolvedTargetingPack)"
                                RuntimeFrameworks="@(RuntimeFramework)"
                                GenerateErrorForMissingTargetingPacks="$(GenerateErrorForMissingTargetingPacks)">

Trying this with dotnet build produces the same error:

λ dotnet build
Microsoft (R) Build Engine version 16.3.0+0f4c62fea for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

  Restore completed in 819.77 ms for C:\Users\<my username>\dev\projects\<My Project>\MyNamespace.Models\MyNamespace.Models.csproj.
  Restore completed in 7.7 sec for C:\Users\<my username>\dev\projects\<My Project>\MyNamespace.Endpoint\MyNamespace.Endpoint.csproj.
  Restore completed in 7.81 sec for C:\Users\<my username>\dev\projects\<My Project>\MyNamespace.Tests\MyNamespace.Tests.csproj.
  Restore completed in 12.02 sec for C:\Users\<my username>\dev\projects\<My Project>\MyNamespace.Proxy\MyNamespace.Proxy.csproj.
  
C:\Program Files\dotnet\sdk\3.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(263,5): error NETSDK1073: The FrameworkReference '.NETStandard,Version=v2.0' was not recognized [C:\Users\<my username>\dev\projects\<My Project>\MyNamespace.Models\MyNamespace.Models.csproj]

Build FAILED.

C:\Program Files\dotnet\sdk\3.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(263,5): error NETSDK1073: The FrameworkReference '.NETStandard,Version=v2.0' was not recognized [C:\Users\<my username>\dev\projects\<My Project>\MyNamespace.Models\MyNamespace.Models.csproj]
    0 Warning(s)
    1 Error(s)

Time Elapsed 00:00:23.39

Workaround

Open the project in Visual Studio 2017 and I am able to produce builds without error.

Expected behavior

The project would not report errors and could be built.

Environment Data

λ dotnet --info .NET Core SDK (reflecting any global.json): Version: 3.0.100 Commit: 04339c3a26

Runtime Environment: OS Name: Windows OS Version: 10.0.18362 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\3.0.100\

Host (useful for support): Version: 3.0.0 Commit: 7d57652f33

.NET Core SDKs installed: 2.1.402 [C:\Program Files\dotnet\sdk] 2.1.502 [C:\Program Files\dotnet\sdk] 2.1.801 [C:\Program Files\dotnet\sdk] 2.1.802 [C:\Program Files\dotnet\sdk] 2.2.105 [C:\Program Files\dotnet\sdk] 2.2.401 [C:\Program Files\dotnet\sdk] 2.2.402 [C:\Program Files\dotnet\sdk] 3.0.100 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed: Microsoft.AspNetCore.All 2.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.13 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.App 2.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.13 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.0.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 2.1.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.13 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 3.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]