如何使用Entity Framework 4.2执行数据库迁移？

I'm just starting to dive into ASP.net MVC3. I come from a Django background. One of the things I love about Django, is the add-on called "South". It lets me modify my Models in code, and then I run a command, it figures out what has changed, and it updates the database accordingly.I'm just starting to dive into ASP.net MVC3. I