title: Using Moles for TDD with HttpWebRequest
body: <p>I am using VS2010 with SP1 (also have VS2012 installed on the same machine). Moles 1.0
  The project is using .NET 4 
  I added moles assembly to system.dll and get the following error on compile</p>
  
  <p>Error   46  The type or namespace name 'IReadOnlyList' does not exist in the namespace 'System.Collections.Generic' (are you missing an assembly reference?) [C:\Test\obj\Debug\Moles\s\m.g.csproj] C:\Test\m.g.cs  Test</p>
  
  <p>IReadOnlyList .NET 4.5 as far as I know.</p>
  
  <p>Anyone else got this issue?</p>