Every time I attempted to create a single solution in Visual Studio 2008 with multiple projects, the Solution icon in the Solutions window disappeared after adding the first project. That resulted in my not being able to add additional projects by right clicking the top level solution icon. You can fix that easily by clicking Tools –> Options –> “Projects and Solutions” General property page and checking “Always show solution“. I am not sure why the default was unchecked, but it was. I hope this tip helps people that might be confused by this behavior.