public ContextMenu(CollectionOutlineView outlineView)
{
this.outlineView = outlineView;
Delegate = new ContextMenuDelegate();
}
protected CollectionOutlineViewDelegate(CollectionOutlineView outlineView)
{
OutlineView = outlineView ?? throw new ArgumentNullException(nameof(outlineView));
OutlineView.DoubleClick += OutlineView_DoubleClick;
}