Cassini Web Server originally originated from displaying ASP.. Net hosting capabilities. It has been built in the development environment since Visual Studio 2005 to provide ASP.. NET is used during development. If your development environment experience is limited, Cassini is a clever ASP. NET environment. However, the management function of the original Cassini version is very busy and inconvenient to use. Ultidev virtualizes the Cassini management function, presents it in Windows Services mode, and provides the Cassini Web Server Explorer management tool, using ultidev Cassini web server as the name for activation and use without license, which can be used for commercial or non-commercial purposes, ultidev Cassini web server provides ASP. NET 1.1 and 2.0 support 32-bit and 64-bit operating systems, in Windows XP, Windows Vista, both Windows 2000 and Windows Server 2003 can be used. If you are interested, you may wish to see them later.