When a .NET application is running it registers and updates a large number of performance counters which you can use to monitor the way your application is running - for example, how many threads it is using, what its memory usage is, how long it spends doing garbage collection and so on.
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\r\nYou can read these properties using the .NET framework built in PerformaceCounter class. The attached code does just that and presents the results in a graphical format which you can have open and watching as you test your application - as this can show up performance issues before the users get to see the problems.