无法使用EntityFramework创建新数据库

Question

我有SQL Server 2014 Developer Edition并使用Entity Framework 5.0。当我第一次尝试点击页面时，实体框架无法创建新数据库并收到以下错误消息

The provider manifest given is not of type 'System.Data.SqlClient.SqlProviderManifest'.

ArgumentException: The provider manifest given is not of type 'System.Data.SqlClient.SqlProviderManifest'.]
   System.Data.SqlClient.SqlProviderServices.GetSqlVersion(StoreItemCollection storeItemCollection) +2600711
   System.Data.SqlClient.SqlProviderServices.DbCreateDatabase(DbConnection connection, Nullable`1 commandTimeout, StoreItemCollection storeItemCollection) +213
   System.Data.Common.DbProviderServices.CreateDatabase(DbConnection connection, Nullable`1 commandTimeout, StoreItemCollection storeItemCollection) +21
   EFProviderWrapperToolkit.DbProviderServicesBase.DbCreateDatabase(DbConnection connection, Nullable`1 commandTimeout, StoreItemCollection storeItemCollection) +150
   System.Data.Objects.ObjectContext.CreateDatabase() +84
   System.Data.Entity.Migrations.Utilities.DatabaseCreator.Create(DbConnection connection) +83
   System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists() +70
   System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration) +44
   System.Data.Entity.MigrateDatabaseToLatestVersion`2.InitializeDatabase(TContext context) +62
   System.Data.Entity.<>c__DisplayClass2`1.<SetInitializerInternal>b__0(DbContext c) +70
   System.Data.Entity.Internal.<>c__DisplayClass8.<PerformDatabaseInitialization>b__6() +19
   System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) +60
   System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() +181
   System.Data.Entity.Internal.LazyInternalContext.<InitializeDatabase>b__4(InternalContext c) +7
   System.Data.Entity.Internal.RetryAction`1.PerformAction(TInput input) +110
   System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action`1 action) +185
   System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase() +73
   System.Data.Entity.Internal.InternalContext.ForceOSpaceLoadingForKnownEntityTypes() +60
   System.Data.Entity.DbContext.System.Data.Entity.Infrastructure.IObjectContextAdapter.get_ObjectContext() +25

任何帮助将不胜感激。