CODEWITHSUNDEEP
c#eventsdelegates
Rahna1970418
Rahna1970418

Reputation: 2445

Event unsubscribe

I need to unsubscribe all delegates subscribed on my event. But I found two ways to do it..

class Cls
{
    delegate void doDel();
    static event doDel doE;

    void Uns
    {
    //first
    foreach (doDel item in doE.GetInvocationList())
    {
        doE -= item;
    }

    //second
       doE = null;
    }
}

What difference between? And what way is best and why?

Upvotes: 1

Views: 166

Answers (1)

Alex Tsvetkov
Alex Tsvetkov

Reputation: 1659

First approach is quite correct. As MSDN states:

  • Use the subtraction assignment operator (-=) to unsubscribe from an event:

    publisher.RaiseCustomEvent -= HandleCustomEvent;

When all subscribers have unsubscribed from an event, the event instance in the publisher class is set to null.

Upvotes: 1

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