protected virtual void OnSelectionChanged(SelectionChangedEventArgs args)        {        }

 

1  public TestTabControl() 2         { 3             KeyEventHandler handler = null; 4             SelectionChangedEventHandler handler2 = null; 5             this._updateIndex = true; 6             this.SelectedIndex = -1; 7  8              9             if (handler == null)10             {11                 handler = (sender, e) => this.OnKeyDown(e);12             }13             base.KeyDown += handler;14 15             //make child can override SelectionChanged event16             if (handler2 == null)17             {18                 handler2 = (sender, e) => this.OnSelectionChanged(e);19             }20             this.SelectionChanged += handler2;21 22 23             base.IsEnabledChanged += new DependencyPropertyChangedEventHandler(this.OnIsEnabledChanged);24             base.DefaultStyleKey = typeof(TestTabControl);25 26         }