When I open a c# source code, from either inside or outside the IDE, the following error message pops up
" vdproject cannot be opened because its project type (.vdproj) is not supported by this version of the application. To open it, please use a version that supports this type of project. "
I tried the latest C# 2010 express edition, and Visual C# 2008 express (from Microsoft Visual Studio 2008 version 9.0.30729.1 SP. Microsoft .NET framework Version 3.5 SP1). Same error.
Refer below screenshots.
What should I do? I have no experience with .NET. Advance thanks!