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Editorial Team
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Asked: 2026-06-11T22:29:20+00:00

The .NET System.Threading Timer class has several overloaded Change() methods that return true if

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The .NET System.Threading Timer class has several overloaded Change() methods that return “true if the timer was successfully updated; otherwise, false.”

Ref: http://msdn.microsoft.com/en-us/library/yz1c7148.aspx

Does this method ever actually return false? What would cause this to return false?

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  1. Editorial Team

    Joe Duffy (the development lead, architect, and founder of the Parallel
    Extensions to the .NET Framework team at Microsoft) detailed in Concurrent Programming on Windows p 373

    Note that although Change is typed as returning a bool, it will actually never return anything but true. If there is a problem changing the timer-such as the target object already having been deleted-an exception will be thrown.

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