What is the appropriate initial value for a ElapsedTime Performance Counter?

What is the proper initial value for an Elap开发者_StackOverflowsedTime performance counter? When my app starts up I am setting the .RawValue of the performance counter instance to 0 but that is not correct. It looks like it needs to be based on the current time but I'm not sure what is the actual value I should be using.

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You should set it to Stopwatch.GetTimestamp();

See this MSDN example