What's a proper way to unsibscribe from events in c#?

Question

I have a model class with an event which I subscribe from other classes. I want to subscribe and un-subscribe in each class correctly.

• First I want to guarant

Answer 1

If you want to guarantee you only unsubscribe once, you can use the GetInvocationList method:

if (_model.OnMyEvent != null && _model.GetInvocationList().Contains(EventHandle))
{
    _model.OnMyEvent -= EventHandle
}

But as mentioned by the others, you can unsubscribe multiple times. If this really isn't a problem, keep it that way. The solution I propose is just code-noise. Simply unsubscribing in one line is much neater, and easier to read when your class starts to grow.