/// <summary> /// Extends BeginInvoke so that when a state object is not needed, null does not need to be passed. /// <example> /// consolecanceleventhandler.BeginInvoke(sender, e, callback); /// </example> /// </summary> public static IAsyncResult BeginInvoke(this ConsoleCancelEventHandler consolecanceleventhandler, Object sender, ConsoleCancelEventArgs e, AsyncCallback callback) { if (consolecanceleventhandler == null) { throw new ArgumentNullException("consolecanceleventhandler"); } return(consolecanceleventhandler.BeginInvoke(sender, e, callback, null)); }