Question

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Remove handlers on disposing object

I have some code which dynamically adds and removes Controls to/from a Form. The controls are stored in a collection owned by the form. When removing controls the code goes through and disposes of them as follows

   if (node != null && !node.IsDisposed)
   {
      node.Resize -= docNode_Resize;
      node.DocumentRefreshRequested -= docNode_DocumentRefreshRequested;
      node.Dispose();
   }

Is the removing of events part necessary? Seems like Dispose() is sufficient.

Answer 1

It was asked So many times.

No, you do not need that, unless:

• events are with static subscriptions
• massive quantity of events and subscription (from personal expirience, unsubscribing benefits in terms of memory consuption)