I have a small testproject on VS2010 using c# (.NET 4.0, OS is WinServer2008R2)
I added a reference to a DLL and I can use the functions from this DLL --> VS2010 knows the functions. :-)
But as soon, as I want to compile my application, the VS2010 does not know the functions any more and I get an compile error (CS0246) :-(
After closing and opening the project, the functions are known again untill the next compiling.
What could be the reason?