>>Check http://www.emoreau.com/Entries/Articles/2004/08/Interfacing-the-Windows-Task-Scheduler.aspx. It is also outdated but the scheduler didn't changed that much over years. Be sure to also look at the comments at the bottom as there are a couple of other links.
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>Everyone on the net seems to relate to a wrapper. I need the core functionality of such a wrapper. I have located the namespace System.Threading.Tasks.TaskScheduler which I think is the base for this. But, there isn't much documentation around about this.

I gather from earlier posts in this thread that you are interested in working with the Windows Task Scheduler, in order to start or stop tasks that may be scheduled to run periodically, over time spans of multiple minutes, hours or even days.

I believe that is a different thing from System.Threading.Tasks.TaskScheduler, which appears to handle thread queueing, execution and management at a fine-grained level, of the order of seconds at most, or fractions of a second more typically: http://msdn.microsoft.com/en-us/library/dd997402.aspx . I don't think that's what you want to do. That namespace seems to be a .Net implementation of an OS scheduler: http://en.wikipedia.org/wiki/Scheduling_%28computing%29