Configure an ASP.NET Application for ASP.NET

By default, when the Microsoft®.NET Framework is installed on a computer with an existing .NET Framework installation, most Microsoft ASP.NET applications are automatically updated to use the newly installed version. The exceptions are applications that are bound to an incompatible or later version of the .NET Framework. Although later versions of the .NET Framework are designed to be backward compatible, you might need to configure an ASP.NET application to use an earlier version, if it cannot run successfully on a later version of the .NET Framework.

When multiple versions of the .NET Framework are executing side-by-side on a single computer, the ASP.NET ISAPI version script that is mapped to an ASP.NET ...

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