Ever wondered why you are not able to see the solution name in order to add more projects after adding first project to the solution ?? Show All files also doesnt get the Solution back..Here is a tip to get it back...
Go to Tools->Options ->Projects and Solutions ->General and select Always show solution checkbox ..thats it!! any guess, why would this not be a default setting for VisualStudio??
Anyways, go ahead and explore all the Visual Studio menu items once to get to know more of such environment settings.