Xceed.Wpf.Toolkit.DropDownButton.OnApplyTemplate C# (CSharp) Method

    public override void OnApplyTemplate()
    {
      base.OnApplyTemplate();
      Button = GetTemplateChild( PART_DropDownButton ) as ToggleButton;

      _contentPresenter = GetTemplateChild( PART_ContentPresenter ) as ContentPresenter;

      if( _popup != null )
        _popup.Opened -= Popup_Opened;

      _popup = GetTemplateChild( PART_Popup ) as Popup;

      if( _popup != null )
        _popup.Opened += Popup_Opened;
    }