System.IO.FileLoadException bei Verwendung von EntityFramework Core 2.0

Question

Ich verwende den In-Speicher-Anbieter in einem .Net 461-Einheitentestprojekt. Ich verwende VS 2017.

var contextOptionsBuilder = new DbContextOptionsBuilder(); 
      contextOptionsBuilder 
      .UseInMemoryDatabase("testmethod1"); 
      var ctx = new ConfigStoreDbContext(contextOptionsBuilder.Options); 

Die packages.config enthält das folgende Paket.

<package id="System.ValueTuple" version="4.4.0" targetFramework="net461" /> 

Hier ist der Stack-Trace.

Test Name: TestMethod1 
    Test Outcome: Failed 
    Test Duration: 0:00:01.1170206 

    Result StackTrace: 
    at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.EntityGraphAttacher.AttachGraph(InternalEntityEntry rootEntry, EntityState entityState, Boolean forceStateWhenUnknownKey) 
     at Microsoft.EntityFrameworkCore.DbContext.SetEntityState(InternalEntityEntry entry, EntityState entityState) 
     at Microsoft.EntityFrameworkCore.DbContext.SetEntityState[TEntity](TEntity entity, EntityState entityState) 
     at Microsoft.EntityFrameworkCore.DbContext.Add[TEntity](TEntity entity) 
     at Microsoft.EntityFrameworkCore.Internal.InternalDbSet`1.Add(TEntity entity) 
     at Microsoft.ProjectConfig.Configuration.Sql.SqlConfigurationWriter`4.<AddOrUpdateSettingTypeImplAsync>d__7.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.GetResult() 
     at Microsoft.ProjectConfig.Configuration.ConfigurationWriterBase`4.<AddOrUpdateSettingTypeAsync>d__4.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.GetResult() 
     at Microsoft.ProjectConfig.Configuration.UnitTests.UnitTest1.<TestMethod1>d__0.MoveNext() in C:\Repos\ProjectConfig\UnitTestProject1\UnitTest1.cs:line 25 
    --- 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 Microsoft.VisualStudio.TestPlatform.MSTestAdapter.PlatformServices.ThreadOperations.ExecuteWithAbortSafety(Action action) 
    Result Message: 
    Test method Microsoft.ProjectConfig.Configuration.UnitTests.UnitTest1.TestMethod1 threw exception: 
    System.IO.FileLoadException: Could not load file or assembly 'System.ValueTuple, Version=0.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) 

Answer 1

Dieses Problem ist im Entity Framework-Repository dokumentiert, hier: https://github.com/aspnet/EntityFrameworkCore/issues/9046.