关于nuget：Entity Framework 5.0 RC-软件包管理器命令’add-migration’由于假定缺少配置类型而失败

Entity Framework 5.0 RC - Package Manager command 'add-migration' fails due to supposedly missing configuration type

我正在使用用于C＃/ Visual Studio 2012 RC / .NET 4.0的Entity Framework 5.0.0 RC / EF 5.x DbContext生成器，试图在项目中启用自动迁移。我已经在Package Manager控制台中运行enable-migrations：

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PM> enable-migrations
No classes deriving from DbContext found in the current project.
Edit the generated Configuration class to specify the context to enable migrations for.
Code First Migrations enabled for project Test.

如您所见，它并不会自动检测到我的DbContext派生类型，但是我可以通过在生成的代码文件Migrations/Configuration.cs中输入该类型的名称来轻松解决此问题。

但是，由于找不到上一步添加的迁移配置类型，下一步，包管理器控制台命令enable-migrations失败。

1 2	PM> add-migration Initial No migrations configuration type was found in the assembly 'Test'. (In Visual Studio you can use the Enable-Migrations command from Package Manager Console to add a migrations configuration).

我该如何解决？

编辑：我发现我可以使用参数-ConfigurationTypeName指定配置类型的名称：

1 2	PM> add-migration -ConfigurationTypeName Test.Migrations.Configuration Initial The type 'Configuration' is not a migrations configuration type.

这仍然行不通，但是至少可以阐明为什么add-migration失败，即它认为Test.Migrations.Configuration不是迁移配置类型。考虑到它是由enable- migrations生成的，是否有人知道为什么不被接受？请参阅下面生成的代码以作为参考(UserModelContainer源自DbContext)：

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namespace Test.Migrations
{
using System;
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Linq;
using Test.Models;

internal sealed class Configuration : DbMigrationsConfiguration<UserModelContainer>
{
public Configuration()
{
AutomaticMigrationsEnabled = false;
}

protected override void Seed(UserModelContainer context)
{
// This method will be called after migrating to the latest version.

// You can use the DbSet< T >.AddOrUpdate() helper extension method
// to avoid creating duplicate seed data. E.g.
//
// context.People.AddOrUpdate(
// p => p.FullName,
// new Person { FullName ="Andrew Peters" },
// new Person { FullName ="Brice Lambson" },
// new Person { FullName ="Rowan Miller" }
// );
//
}
}
}