I am working on a solution (a very big solution), and I want to check if I have left anything checked out. How do I see all the items I have checked-out?
And could you also tell me how to see all checked-out items by another user please.
simply pull up the pending changes window (View > Other Windows > Pending Changes) to see what files you have checked out! http://msdn.microsoft.com/en-us/library/ms181395(v=vs.100).aspx
As for the other users, you would need to view the source control window to see who has checked out that file. Simply go to View > Team Explorer then browse to the collection/project you are working on and double click on "Source Control" to open the source control explorer.
This then will show you the directory listing system where you can see who has checked out which file and what kind of check out.
also take a look at this: Can I check what files another person has checked out in Visual Studio 2010