public ConfigElements()
{
InitializeComponent();
_displayedNode = null;
_tooltip = new ToolTip();
multiSelectTreeviewElementsGroups.DragFinishing += MultiSelectTreeviewElementsGroupsDragFinishingHandler;
multiSelectTreeviewElementsGroups.DragOverVerify += MultiSelectTreeviewElementsGroupsDragVerifyHandler;
multiSelectTreeviewElementsGroups.Deselected += MultiSelectTreeviewElementsGroupsDeselectedHandler;
}