安装MVC 4后Razor视图中没有Intellisense - 尝试了各种解决方案

I recently installed MVC 4 on VS2010, but I seem to occasionally be losing my intellisense. I tried installing MVC 4 again the other day, but still no luck on getting it back. This is my current Web.config under my project:I recently installed MVC 4 on VS2010, but I see