I'm sure that a number of people will be interested to hear that I just discovered that you can add projects created in different languages to the same solution in the VS 2005 Express editions. When you open the solution, if it contains any projects not created in the current language you will receive an error message and the projects will fail to load. The solution itself and any projects that were created in the current language will load however. You still have to use different Express IDEs to work on each project, but at least you can just have a single solution. To add a reference to a class library in one language to an application in another language you can only reference an assembly rather than a project though. It's still better than nothing.