IT. Expert System.

C#

add


The add contextual keyword is used to define a custom event accessor that is invoked when client code subscribes to your event. If you supply a custom add accessor, you must also supply a remove accessor.

Syntax:
add{
//body
}


Example:

class Events : IDrawingObject
{
    event EventHandler PreDrawEvent;

    event EventHandler IDrawingObject.OnDraw
    {
        add
        {
            lock (PreDrawEvent)
            {
                PreDrawEvent += value;
            }
        }
        remove
        {
            lock (PreDrawEvent)
            {
                PreDrawEvent -= value;
            }
        }
    }

}


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