I can't seem to find System.Collections.Concurrent on VS2010??

Question

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?

Answer 1

Make sure that you target the .NET 4.0 (or 4.0 Client Profile) Framework. You can do this in the project settings: Right click on your project name in the project explorer, click on settings and keep your eyes open for "Target framework" in the topmost settings-tab.