Just a quick note on the new Browser History feature in .NET 3.5 SP1. I had some time to experiment with beta 1. Because of its long gestation period as part of the ASP Futures package, it has been written about a lot. However, as is the curse of beta software, there is a ‘breaking change’ between the beta 1 release and the futures package version that many blog articles write about.

The feature is still enabled using the EnableHistory attribute on your page’s ScriptManager object.

<asp:ScriptManager runat="server" id="sm1" 
     EnableHistory="true" /> 

However, the EnableStateHash attribute which you can use to have ASP.NET encrypt or not encrypt the page state in its querystring has been renamed. It is now called EnableSecureHistoryState.