EF数据迁移报错，执行Enable-Migrations 命令出现异常

Question

执行 Enable-Migrations 命令出现异常，原因是什么？如何解决？

PM> Enable-Migrations
System.ArgumentException: 参数错误。 (异常来自 HRESULT:0x80070057 (E_INVALIDARG))

Server stack trace: 
   在 EnvDTE.Properties.Item(Object index)
   在 System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs)
   在 System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg)

Exception rethrown at [0]: 
   在 System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   在 System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   在 EnvDTE.Properties.Item(Object index)
   在 System.Data.Entity.Migrations.Extensions.ProjectExtensions.GetPropertyValue[T](Project project, String propertyName)
   在 System.Data.Entity.Migrations.MigrationsDomainCommand.GetFacade(String configurationTypeName, Boolean useContextWorkingDirectory)
   在 System.Data.Entity.Migrations.EnableMigrationsCommand.FindContextToEnable(String contextTypeName)
   在 System.Data.Entity.Migrations.EnableMigrationsCommand.<>c__DisplayClass2.<.ctor>b__0()
   在 System.Data.Entity.Migrations.MigrationsDomainCommand.Execute(Action command)
参数错误。 (异常来自 HRESULT:0x80070057 (E_INVALIDARG))

Answer 1

this is a deceptive error, you get this when trying to perform the enable-migrations on a website, this needs to be performed on a web application