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