How to stop all cassini instances?

asp.net cassini

The process name has changed on this version its now:

taskkill /IM WebDev.WebServer40.exe /F

When that doesn't work, check the tasklist for a similar name.

asp.net cassini

This Visual Studio extension provides a quick way to kill all instances of Cassini (via a shortcut key)

EDIT :
If you want to do it via command line only, then you can use the taskkill command. An example:

taskkill /IM WebDev.WebServer /F

See this page for more examples, and an explination of the command. You may need to specify WebDev.WebServer40 for the .Net 4 web server

CodeHunter