Migrating Atlas applications to ASP.NET AJAX sounds like a rather hard and messy task; all applications have to be changed. However, in most cases, not much effort is required for the migration. There are several reasons for this. First, the most important features of Atlas changed only marginally in ASP.NET AJAX. And second, the most convenient features already exist, not in the ASP.NET AJAX package itself but in the Atlas Control Toolkit, which is now called ASP.NET AJAX Control Toolkit.

This Short Cut mentions important changes for every chapter in Programming Atlas, if applicable. Not all of the functionality used in Programming Atlas survived the switch to ASP.NET AJAX; however, the most important elements of the framework are still there, and continue to work in a very similar fashion. Of course this Short Cut is not complete and does not cover every aspect that has been changed. It should help you, however, to judge whether it is feasible to port existing Atlas applications to ASP.NET AJAX or not.

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