public PositionEditWindow(Position position)
  {
      InitializeComponent();
      PEViewModel = new PositionEditViewModel(position);
      this.DataContext = PEViewModel.EditedPosition;
  }
 public PositionEditWindow(Position position)
 {
     InitializeComponent();
     PEViewModel      = new PositionEditViewModel(position);
     this.DataContext = PEViewModel.EditedPosition;
 }