VS2012 created ado.net models cannot be instantiated solution _ practical Tips

A recent upgrade from VS2010 to vs2012, a data model, found that the generated things are not the same as before, and cannot be instantiated. Baidu tried n kinds of keywords, finally I found a way to solve. Let's record it here.

1. Open the designer, which means double click on the

2. Find attributes, code generation policies, no changes to default when no objects are selected

3. Delete the two TT files under EDMX

4. Rebuild Project

The above is the entire content of this article, I hope to be proficient in the use of vs2012 can help.