Server Error in '/' Application.

Compilation Error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS0234: The type or namespace name 'Html' does not exist in the namespace 'System.Web.Mvc' (are you missing an assembly reference?)

Source Error:

Line 192:        <add namespace="System.Web.Mvc" />
Line 193:        <add namespace="System.Web.Mvc.Ajax" />
Line 194:        <add namespace="System.Web.Mvc.Html" />
Line 195:        <add namespace="System.Web.Optimization" />
Line 196:        <add namespace="System.Web.Routing" />

Source File: d:\inetpub\wwwdata\RC_MVC\public_html\Web.config    Line: 194

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1022