title: I can't seem to find System.Collections.Concurrent on VS2010?
body: <p>I've got VS2010 and im pretty sure .NET 4.0, as if i try to install it from MS it says do i wish to repair the current version- so i must have it. But i want to create a concurrent dictionary and i cant seem to find the correct packet. I went to references to add it manually but it wasnt in my list?</p>