How to check if Thread finished execution

Use the Thread.IsAlive flag. This is to give the thread status.

For a thread you have the myThread.IsAlive property. It is false if the thread method returned or the thread was aborted.

c# multithreading thread-state

You could fire an event from your thread when it finishes and subscribe to that.

Alternatively you can call Thread.Join() without any arguments:

Blocks the calling thread until a thread terminates, while continuing to perform standard COM and SendMessage pumping.

Blocks the calling thread until a thread terminates or the specified time elapses, while continuing to perform standard COM and SendMessage pumping.

In this case the specified time is 1 millisecond.

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