private void RangeSlider_LowerThumbDragCompleted(object sender, System.Windows.Controls.Primitives.DragCompletedEventArgs e) { var thump = e.OriginalSource as MahApps.Metro.Controls.MetroThumb; var range = thump.TemplatedParent as MahApps.Metro.Controls.RangeSlider; lowerValue = Convert.ToInt32(range.LowerValue); PriceTitle.Text = $"{lowerValue} TL - {upperValue} TL"; content.OrderByLowPrice(lowerValue); }