Are events blocking or non-blocking when you call them?

Let's say I have an event Tick which I call:

public class Test
{
    public event Action Tick;

    public void Test()
    {
         Tick();
         Console.WriteLine("Tick Finished");
    }
}

If I have loads of events subscribed to Tick, will the oper开发者_开发百科ation of this thread that is running Test() be blocked until they have all been called or does it perform this asynchronously?

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All events are blocking. The thread execution will be blocked until all the event handlers registered to this event have been executed.

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While Tick() runs, it will block you from progressing further through the code.

To prove it to yourself, write a console app to do just that, that has a bunch of subscribers to the event, and watch to see what happens.