System. Web. Mvc. AJAX lacks Assembly reference and Assembly reference.

System. Web. Mvc. AJAX lacks Assembly reference and Assembly reference.

This error occurred many times when building a new project today. But every time I forget how to solve it, I can't remember my previous blog...

 

 

Baidu found it

_ Lazy cat

Http://blog.csdn.net/liujiebest/article/details/41694893

The above solution process first references system. web. mvc (this is because someone else's project is used, so this step can be ignored here)

The point is that the reference is copied locally.