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Ian Griffiths comes up with an interesting way to use IDisposable and the “using“ statement to get a very of lock with timeout.

I like the approach, but there are two ways to improve it:

1) Define TimedLock as a struct instead of a class, so that there's no heap allocation involved.

2) Implement Dispose() with a public implementation rather than a private one. If that's the case, the compiler will call Dispose() directly, otherwise it will box to the IDisposable interface before calling Dispose().