C# - Proper Way To Dispose Of System.Timers.Timer?

I have a problem with the Timer class in that there is a chance that a timer would fire right before you call Dispose() since you will probably call Dispose() from some other thread. You may have something like:

Public Sub TimerTick() Handles itsTimer.Elapsed
Do Something
End Sub

And then from somewhere else in the code, when your app is done, you call

itsTimer.Dispose()

The only way I can think of doing this is:

Public Sub SomeMethod()
SyncLock(itsTimer.SynchronizingObject)
itsTimer.Dispose()[code]...

This is not a great thing to do esp. since I am holding a lock on an object I am disposing. I can create my own lock and syncLock on that but is there a simple way?