.net - How do I hide a process in Task Manager in C#?

Question

I have a requirement to hide a process in Task Manager. It is for Intranet scenario. So, everything is legitimate. :)

Please feel free to share any code you have (preferably in C#) or any other techniques or any issues in going with this route.

Update1: Most of the users have admin privileges in order to run some legacy apps. So, one of the suggestion was to hide it in task manager. If there are other approaches to prevent users from killing the process, that would be great.

Update2: Removing the reference to rootkit. Somehow made this post look negative.

Answer 1

Don't try to stop it from being killed - you're not going to manage it. Instead, make it regularly call home to a webservice. When the webservice notices a client "going silent" it can ping the machine to see if it's just a reboot issue, and send an email to a manager (or whoever) to discipline whoever has killed the process.