public override void CallBase()
 {
     if (this.CurrentType != null)
     {
         XamlType baseType = this.CurrentType.BaseType;
         if (baseType != null)
         {
             this.CurrentType = baseType;
             if (baseType.SetTypeConverterHandler != null)
             {
                 baseType.SetTypeConverterHandler(this.TargetObject, this);
             }
         }
     }
 }