Microsoft's .NET program is an exciting vast project. With the release of VS.Net beta2 versions, .NET technology has gradually stabilized and formed, more and more companies and technicians put into .NET In the development, and now it starts early. Net's learning and related development is a good time. However, there is a clear fact that all .NET technology-based applications or products require .NET's run library support, because .NET is similar to the program deployment and distribution, it requires .NET Framework SDK Support (Java application requires JDK support to run), unfortunately, the current Win9X series and WinNT / 2000 series have no built-in .NET SDK (it is not difficult to understand because .NET technology