public static DomEventArgs Create(nsIDOMEvent ev)
        {
            var type = nsString.Get(ev.GetTypeAttribute).ToLowerInvariant();

            // search by name and create child class wrappers
            switch (type)
            {
            case "keydown":
            case "keyup":
            case "keypress":
                return(DomKeyEventArgs.Create((nsIDOMKeyEvent)ev));

            case "mousedown":
            case "mouseup":
            case "mousemove":
            case "mouseover":
            case "mouseout":
            case "contextmenu":
                return(DomMouseEventArgs.Create((nsIDOMMouseEvent)ev));

            case "dommousescroll":
                return(DomMouseScrollEventArgs.Create((nsIDOMMouseScrollEvent)ev));

            case "dragstart":
            case "dragenter":
            case "dragover":
            case "dragleave":
            case "drag":
            case "drop":
            case "dragend":
                return(DomDragEventArgs.Create((nsIDOMDragEvent)ev));

            case "hashchange":
                return(DomHashChangeEventArgs.Create(( nsIDOMHashChangeEvent )ev));
            }
            // search by type
            if (ev is nsIDOMUIEvent)
            {
                return(DomUIEventArgs.Create((nsIDOMUIEvent)ev));
            }
            if (ev is nsIDOMMessageEvent)
            {
                return(DomMessageEventArgs.Create((nsIDOMMessageEvent)ev));
            }
            if (ev is nsIDOMSVGEvent)
            {
                return(DomSvgEvent.Create(( nsIDOMSVGEvent )ev));
            }
            return(new DomEventArgs(ev));
        }
        /// <summary>Raises the <see cref="HashChangeEvent"/> event.</summary>
        /// <param name="e">The data for the event.</param>
		protected virtual void OnHashChange(DomHashChangeEventArgs e)
        {
            var evnt = (EventHandler<DomHashChangeEventArgs>)Events[HashChangeEvent];
            if (evnt != null) evnt(this, e);
        }
 /// <summary>Raises the <see cref="HashChangeEvent"/> event.</summary>
 /// <param name="e">The data for the event.</param>
 protected virtual void OnHashChange(DomHashChangeEventArgs e)
 {
     RaiseEvent(new RoutedEventArgs(HashChangeEvent, e));
 }