I agree that there's a bug, but it's not clear where it is yet. It might not be a bug in XNA Game Studio. VC# 2005 Express doesn't allow add-ins, so if XGS works in VCSExpress, but not VSTE (do you mean Team Edition?), then it could be an incompatibility with a third-party add-in. This problem has not been reported by anyone else so far, so whatever the bug is, something that is particular to your VS installation and/or configuration is triggering it.
I'm not certain why you think a solution file isn't created until you add a second project... There is *always* a solution file, even when you are working with only one project. There is a setting in VS that will hide the solution node in the Solution Explorer by default, and only show it when there is more than one project in the solution. Maybe you are using that option. If so, there is a known bug in that area and you have to work around by disabling the option.
Please try the following steps:
- Select Tools->Options... to bring up the Options dialog.
- On the left-hand-side of the dialog, select "Projects and Solutions".
- On the right-hand-side of the dialog, make sure that the box next to "Always show solution" is checked. (If it isn't, check the box.)
- Click OK on the Options dialog.
Now the solution will always be displayed in the Solution Explorer, even when you have only one project. Please note that the only change is whether this node is visible or not -- there has always been a solution file created for all projects in Visual Studio.
I think we noted this bug in the readme, but it's not the easiest thing to understand from a short description.