# Useful tools...ASP.NET Version Switcher

<datetime class="hidden">2004-02-20T00:00</datetime>
<!-- category -- mostlylucidcouk, Imported, ASP.NET, Tools -->

If by any chance you install a new version of .NET and still want to work with older sites under earlier versions (e.g., for the Whidbey stuff)... check out [Denis Bauer's ASP.NET version switcher](http://www.denisbauer.com/NETTools/ASPNETVersionSwitcher.aspx)...makes it much easier.