I\'m modifying demo application from this article: http://msdn.microsoft.com/en-us/magazine/dd419663.aspx
I need to update all files to use my namespace, for example
Go to someplace the namespace is declared in one of your files. Put the cursor on the part of the namespace you want to change, and press F2. This should rename the namespace in every file. At least, it worked in my little demo project I created to test this answer!
Depending on your VS version, the shortcut might also be Ctrl-R,Ctrl-R.