TimedLock Structure

This class is by Ian Griffiths, see: http://www.interact-sw.co.uk/iangblog/2004/04/26/yetmoretimedlocking [FB]Comment below is by Ian as well. Class is left as-is with very minor changes in comments and code placement. Thanks to Eric Gunnerson for recommending this be a struct rather than a class - avoids a heap allocation. Thanks to Change Gillespie and Jocelyn Coulmance for pointing out the bugs that then crept in when I changed it to use struct... Thanks to John Sands for providing the necessary incentive to make me invent a way of using a struct in both release and debug builds without losing the debug leak tracking.

public struct TimedLock : IDisposable

Public Structure TimedLock
	Implements IDisposable