came across my way today – looks useful.
“A C# library containing wrapper classes for ACL, ACE, Security descriptors, Security Attributes, Access tokens, etc. The archive also contains 3 samples: A “Task manager” WinForms application that uses the library to display token information of running processes and threads. A command line version of the same application. And finally, a demo application displaying the DACL of the “C:boot.ini” file and creating a Win32 Event object with a security descriptor built using the library classes.“