How do I upgrade an existing EDMX 1.0 model to the new EDMX 2.0?

I'd like to upgrade an existing EDMX model without having to regenerate it by hand. The database is o开发者_JAVA百科ld, contains virtually no foreign keys and has many tables that had to be merged into single entities. I would like to use the EDMX 2.0 that comes with Visual Studio 2010, but I do not want to recreate the model by hand as that would put us way behind schedule.

Any suggestions?

---

Open your old project in VS 2010. Then just change Target Framework from 3.5 to 4.0 in your project settings. In this case the .edmx file will be updated automatically.