CODEWITHSUNDEEP
c#entity-framework
Essej
Essej

Reputation: 861

Entity Framework cannot create any migrations

I wanted to get started using EF and followed Microsofts docs. Everything builds fine but when I try to create the initial migration PM throws an exception.

Exception calling "SetData" with "2" argument(s): "Type 'Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProject' in assembly 
'Microsoft.VisualStudio.ProjectSystem.VS.Implementation, Version=15.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' is not marked as serializable."
At C:\Users\Anton\.nuget\packages\entityframework\6.2.0\tools\EntityFramework.psm1:720 char:5
+     $domain.SetData('project', $project)
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : SerializationException

System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Data.Entity.Migrations.Extensions.ProjectExtensions.GetPropertyValue[T](Project project, String propertyName)

I have googled a lot and found other people having the same problem. I have tried all the solutions there, especially the ones including setting the startup project but that does not seem to work. For example running -StartupProjectName WebApplication1 just throws an error saying that -StartupProjectName does not exist. If I download an example project that uses EF however, migrations seem to work. I have also tried creating a class lib project and done the migrations there but it has the same result.

Upvotes: 2

Views: 2728

Answers (1)

Essej
Essej

Reputation: 861

As @Ivan Stoev pointed out, I was using the wrong EF version. Here is a short article explaining the difference between EF and EF Core.

Upvotes: 4

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