UI restore failure on .NET Core xunit unit test project

[rainersigwald]

Details about Problem

NuGet product used (NuGet.exe | VS UI | Package Manager Console | dotnet.exe):
VS UI

NuGet version (x.x.x.xxx):

VS version (if appropriate): (internal build) Microsoft Visual Studio Enterprise 2017 RC Version 15.0.26130.0 D15PREREL

OS version (i.e. win10 v1607 (14393.321)): Version 10.0.14393 Build 14393

Worked before? This is the first time I've tried it.

Detailed repro steps so we can see the same problem

1. Clone https://github.com/rainersigwald/msbuild/tree/sdk-progress/framework-tests

2. Open src/MSBuild.sln in VS 2017

3. Right click on the "UnitTests" project in the Solution Explorer and click Build.

4. Observe this error in the Output window

Error occurred while restoring NuGet packages: System.InvalidOperationException: The operation failed as details for project Framework could not be loaded.
   at NuGet.PackageManagement.VisualStudio.CpsPackageReferenceProject.GetPackageSpecsAsync(DependencyGraphCacheContext context)
   at NuGet.PackageManagement.DependencyGraphRestoreUtility.<GetSolutionRestoreSpec>d__8.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NuGet.PackageManagement.DependencyGraphRestoreUtility.<IsRestoreRequiredAsync>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NuGet.SolutionRestoreManager.SolutionRestoreJob.<RestorePackageSpecProjectsAsync>d__17.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
   at NuGet.SolutionRestoreManager.SolutionRestoreJob.<RestoreAsync>d__15.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at NuGet.SolutionRestoreManager.SolutionRestoreJob.<RestoreAsync>d__15.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at NuGet.SolutionRestoreManager.SolutionRestoreJob.<ExecuteAsync>d__14.MoveNext()

Other

dotnet restore UnitTests.csproj works from the command line with

C:\src\msbuild\src\Framework\UnitTests>dotnet --info
.NET Command Line Tools (1.0.0-rc4-004689)

Product Information:
 Version:            1.0.0-rc4-004689
 Commit SHA-1 hash:  c740fa8f43

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.14393
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\1.0.0-rc4-004689

[rainersigwald]

Possible duplicate of #4307 ?

[rrelyea]

@jainaashish - can you determine if this is the same issue, please?

[jainaashish]

Dupe of #4419 It has been fixed and will be available as part of next visual studio update.

For time being to unblock yourself, you can add below PropertyGroup inside Framework.csproj which will resolve this error:
<PackageVersion>1.0.0</PackageVersion>

But note, your solution has other restore errors as well like Dependency project has multipe target frameworks defined inside project.json which is not a supported scenario. Project.Json only support single target framework but you can import other target frameworks.