One of the drawbacks with the partial postbacks in AJAX is that you can’t go forward or back in your web browser to different states of the page created by the partial postbacks. Nor can you create a shortcut to one of the views.
The ASP.NET 3.5 Extensions has functionality in there to enable these scenarios. It’s pretty simple to pull off thanks to the new tools.
Jonathan Carter has a great post on how to use this. It’s just #1 of more to come so keep tuned. Jonathan is a new to Microsoft’s Visual Studio Developer Platform and Evangelism team with the dream job of writing and speaking about all the cool things you can do in VS. You can tell by his post that he will be a great resource for us to learn new features.
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