Using C#, how does one figure out what process locked a file?

Question

In Windows, how do I determine (using C#) what process locked a file?

Third-party tools are helpful, but not what I\'m looking for.

Answer 1

You absolutely don't need to run in Kernel mode (!!!)
It's a Win32 FAQ since Windows 95 (!) (in C, Google groups, Win32) : read the handle table, from User mode of course, and get the PID from the File handle ...