WPF

private void Control_MouseMove(object sender, MouseEventArgs e)
{
    var draggableControl = sender as UserControl;

    if (isDragging && draggableControl != null)
    {
        Point currentPosition = e.GetPosition(this.Parent as UIElement);

        var transform = draggableControl.RenderTransform as TranslateTransform;
        if (transform == null)
        {
            transform = new TranslateTransform();
            draggableControl.RenderTransform = transform;
        }

        // Problem: currentPosition is the distance from the window's Left edge, 
        // not the left edge of the canvas
        var newX = currentPosition.X - clickPosition.X; 
        if (newX < 0)
        {
            newX = 0;
        }
        if (newX > parent.ActualWidth)
        {
            newX = parent.Width - this.Width;
        }
        transform.X = newX;
        transform.Y = currentPosition.Y - clickPosition.Y;
    }
}

What I have tried:

my dependency property :

public static DependencyProperty Symbol1Name =
          DependencyProperty.Register("Sym1Name", typeof(string), typeof(UserControl1), new FrameworkPropertyMetadata("test", OnSymbol1PropertyChanged))



public string Sym1Name
       {
           get { return (string)this.GetValue(UserControl1.Symbol1Name); }
           set { this.SetValue(UserControl1.Symbol1Name, value); }
       }

The onChange Function

private static void OnSymbol1PropertyChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
       {
           UserControl1 ak = dependencyObject as UserControl1;
           ak.OnPropertyChanged("Symbol1Name");
           ak.OnSymbol1PropertyChanged(e);

}

The function to Change works in normal WPF App:

private void OnSymbol1PropertyChanged(DependencyPropertyChangedEventArgs e)
        {
            try
            {
                

                
                change(Sym1Name, 0);
                

            }
            catch (System.Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

<Grid x:Name="Grid1" Grid.Column="1" Background="Gray" Margin="5,0,0,0" >

               <Grid.RowDefinitions>
                   <RowDefinition Height="Auto"  />

               </Grid.RowDefinitions>

           </Grid>