public void ShowDataTree(I_DataTreeView view)
 {
     //foreach (var item in grdMain.Children)
     //{
     //    if (item == view)
     //        exists = true;
     //}
     grdDataTree.Children.Clear();
     grdDataTree.Children.Add(view as UIElement);
 }
 public void ShowDataTree(I_DataTreeView view)
 {
     grdDataTree.Children.Clear();
     grdDataTree.Children.Add(view as UIElement);
 }