In our discussion of session state we have seen a number of cases where it is desirable to be able to configure ASP.NET. There are two types of configurations:
Server configuration specifies default settings that apply to all ASP.NET applications.
Application configuration specifies settings specific to a particular ASP.NET application.
Configuration is specified in files with an XML format, which are easy to read and to modify.
The configuration file is machine.config. This file is located within a version-specific folder under \WINNT\Microsoft..NET\Framework. Because there are separate files for each version of .NET, it is perfectly possible to run different versions of ASP.NET ...