Failed to load type 'System.Data.Entity.DbSetExtensions' from assembly' EntityFramework

Question

Updated from entityframework 6.0.0-beta1 to 6.0.0-rc1 and when I enter my MVC5 application, I get the following error:

{"Could not load type 'System.Data.Entity.DbSetExtensions' from assembly 'EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.":"System.Data.Entity.DbSetExtensions"} [System.TypeLoadException]: {"Could not load type 'System.Data.Entity.DbSetExtensions' from assembly 'EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.":"System.Data.Entity.DbSetExtensions"} Data: {System.Collections.ListDictionaryInternal} HelpLink: null HResult: -2146233054 InnerException: null Message: "Could not load type 'System.Data.Entity.DbSetExtensions' from assembly 'EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'." Source: "Microsoft.AspNet.Identity.EntityFramework" StackTrace: " at Microsoft.AspNet.Identity.EntityFramework.Store`1.GetByID(Object id)\r\n at Microsoft.AspNet.Identity.EntityFramework.UserSecretStore`1.<Find>d__c.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at Microsoft.AspNet.Identity.EntityFramework.UserSecretStore`1.<Validate>d__8.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at Microsoft.AspNet.Identity.EntityFramework.IdentityStoreManager.<ValidateLocalLogin>d__20.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime. CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at Microsoft.AspNet.Identity.EntityFramework.IdentityAuthenticationManager.<CheckPasswordAndSignIn>d__22.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()\r\n at BASRaT5.Controllers.AccountController.<Login>d__2.MoveNext() in c:\\dev\\BASRAT\\BASRaT5\\BASRaT5\\Controllers\\AccountController.cs:line 53\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification( Task task)\r\n at lambda_method(Closure , Task )\r\n at System.Threading.Tasks.TaskHelpersExtensions.ThrowIfFaulted(Task task)\r\n at System.Web.Mvc.Async.TaskAsyncActionDescriptor.EndExecute(IAsyncResult asyncResult)\r\n at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass34.<BeginInvokeAsynchronousActionMethod>b__33(IAsyncResult asyncResult)\r\n at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult)\r\n at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()\r\n at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult)\r\n at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3c()\r\n at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass45.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3e()\r\n at System.Web.Mvc.Async.AsyncControllerAct ionInvoker.<>c__DisplayClass30.<BeginInvokeActionMethodWithFilters>b__2f(IAsyncResult asyncResult)\r\n at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult)\r\n at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()\r\n at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult)\r\n at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass1e.<>c__DisplayClass28.<BeginInvokeAction>b__19()\r\n at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass1e.<BeginInvokeAction>b__1b(IAsyncResult asyncResult)" TargetSite: {System.Threading.Tasks.Task`1[TEntity] GetByID(System.Object)} 

my csproj has the following links

 <Reference Include="System.Data" /> <Reference Include="System.Data.Entity.Design" /> <Reference Include="System.Data.DataSetExtensions" /> 

web.config

  <system.web> <compilation debug="true" targetFramework="4.5"> <assemblies> <add assembly="System.Data.Entity.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" /> </assemblies> </compilation </system.web> 

This worked earlier, do I need a new version of the System.Data.Entity.Design dll? or change the assembly version in the web.config file?

EDIT: It looks like the Identity Framework guys should release an updated dll to match?

Answer 1

There have been several changes to namespaces and type transfers. I updated the sample from Beta1 - RC1 https://github.com/rustd/AspnetIdentitySample You can see the following message to get a list of necessary changes. In the near future I will add several documents to the project https://github.com/rustd/AspnetIdentitySample/commit/b09479a9e5c2d4ff16c459ce0e4105c5ac5302f4

Answer 2

An ASP.NET Identity update that fixes this problem and supports EF6 RC will be available very soon.

UPDATE: A new version is available on NuGet .

Answer 3

I got this error when adding version 6 of the EntityFramework library to my MVC4 project. Lowering the EntityFramework version 5 permissions resolved my problem!