Hello,

I've been having a problem since installing the first beta of Visual Studio 2010 which has limited what i have been able to do.

The problem centres around one reference: System.Design

When I attempt to add the reference i get the following error:



However, the System.Design.dll file actually does exist and is valid:



I have tried re-installing the .NET 4 framework but the problem still exists.

The weird thing is the problem is only for the System.Design library. I can reference any other library fine.

Anyone know why this is happening?

Ty.