Migrating to ASP.NET
The topics in this section describe how to migrate to ASP.NET version 2.0 from previous ASP.NET versions and from ASP. ASP.NET 2.0 includes significant improvements over previous versions of ASP.NET in many areas, including productivity, flexibility and extensibility, performance, and security. The .NET Framework version 2.0 provides a high degree of support for backward compatibility. Most applications created using the .NET Framework version 1.0 or 1.1 will run on the .NET Framework 2.0. You can use features of ASP.NET 2.0 in your existing applications, provided they are running on the .NET Framework 2.0. However, to get the most benefit from ASP.NET 2.0, it is recommended that you migrate your application to use the ASP.NET 2.0 Web application page model and folder structure.
For information on migrating from platforms other than ASP or ASP.NET as well as general migration questions, see the ASP.NET Development Center for Migration.