Down-convert Visual C# 2008 Professional to Express?

I have been working on a project in Visual Studio 2008 Professional, and I recently tried to open it up on a computer with Visual Studio 2008 Express and four of the six projects were unavailable as Visual Studio puts it. I don't understand why, I am not using openMP or plugins. Just my code, some XNA, and a couple of libraries like EasyStorage.

Am I stuck? I thought there would be an automatic conversion. I also couldn't ever get others to help 开发者_开发知识库me on my projects if it requires them to buy Visual Studio 2008 or Visual Studio 2010 Professional...

Where did the missing projects live on your computer? Look in your solution file, and make sure you don't have an odd project reference to a location (directory, mapped share) that doesn't exist or isn't accessible on your target computer. Something like:

Project("{...}") = "Proj1", "..\..\..\temp\proj1.csproj"