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Events are executed in the current thread or in a new one.

When an event occurs, the handler is executed in the same thread as the main program or in another thread ?.

Thank!

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It starts in the thread that triggered the event.

Examples:

  • User presses button: GUI stream.
  • A background thread updates an object property: this background thread
  • WCF message received: thread from thread pool

If you are working with a graphical interface, this often means that you need to output an event from a background thread to a GUI thread before touching any controls.

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Source: https://habr.com/ru/post/1745915/

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