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