System.Object
   System.Collections.ObjectModel.Collection<T>
      System.Collections.ObjectModel.ObservableCollection<T>
         C1.WPF.Gauge.GaugeRangeCollection
   System.EventArgs
      C1.WPF.Gauge.GaugeValueEventArgs
   System.Windows.Threading.DispatcherObject
      System.Windows.DependencyObject
         C1.WPF.Gauge.GaugeRange
         System.Windows.Media.Visual
            System.Windows.UIElement
               System.Windows.FrameworkElement
                  System.Windows.Controls.Control
                     C1.WPF.Core.C1View
                        C1.WPF.Gauge.C1Gauge
                           C1.WPF.Gauge.C1LinearGauge
                              C1.WPF.Gauge.C1BulletGraph
                           C1.WPF.Gauge.C1RadialGauge

Reference

C1.WPF.Gauge Assembly