TFS MVC Application Build Reference Problem

c:\Windows\Microsoft.NET\Framework\v3.5\Microsoft.Common.targets(0,0): 开发者_JS百科 warning MSB3245: Could not resolve this reference. Could not locate the assembly "System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL". Check to make sure the assembly exists on disk. If this reference is required by your code, you may get compilation errors.

I am getting this Error message when I build my MVC application.

Do I need to give any additional reference path in TFS.proj file?

<ItemGroup>
    <!--  ADDITIONAL REFERENCE PATH
     The list of additional reference paths to use while resolving references. For example:

         <AdditionalReferencePath Include="C:\MyFolder\" />
         <AdditionalReferencePath Include="C:\MyFolder2\" />
    -->
  </ItemGroup>

Basically its saying some .dll file is missing?