[CLOSED] WebPages AND Namespace

2.0
Namespace "System.Web" does not exist type or namespace name "WebPages".
System.Web.WebPages.WebPageBase has a red underline.
However, when adding the references can not find System.Web.WebPages.
It is in AbstractComponent.cs.

pls help me,thanks.

You have to install ASP.NET MVC 3

Problem has been solved, thank you. Not to start the installation, and reinstall on the right.