Until I surf over internet, I've found an incredible tool for C# and Vb.Net developer.
If you don't remember (like me) all possible formatting options, you found this utility very usefull.
It's a Silverlight project, indeed you must install the silverlight plugin on your browser (if you haven't).
Follow the instructions on the utility and copy the sample code with your pretty Ctrl + C.

http://blog.toolico.com/2008/tool/string-format-made-simpl