 <p>Assuming you are using <code>WPF</code> try to reading this: <a href="http://stackoverflow.com/questions/847752/net-wpf-remember-window-size-between-sessions">.NET WPF Remember window size between sessions</a></p> <p>Assuming you are using <code>winForms</code>: <a href="http://www.codeproject.com/Articles/15013/Windows-Forms-User-Settings-in-C" rel="nofollow">http://www.codeproject.com/Articles/15013/Windows-Forms-User-Settings-in-C</a></p> <p>I think these articles will be a good starting point. Good Luck:)</p>