TIME BOMBThe Visual Studio .NET Release Candidate is recommended for users who have not installed Beta 2 or for users previewing the Microsoft .NET Compact Framework and Smart Device Extensions. Users of Visual Studio .NET Beta 2 may purchase and install the Release Candidate; however, the Release Candidate contains fewer features, and a "time bomb" will prevent usage after February 28, 2002.
其他的具体我就不知道了