internal override XElement CreateXml()
{
var xRoot = new XElement(XmlConstants.Brick);
xRoot.SetAttributeValue(XmlConstants.Type, XmlConstants.XmlPlaySoundBrickType);
if (XmlSoundReference != null)
{
xRoot.Add(XmlSoundReference.CreateXml());
}
////CreateCommonXML(xRoot);
return xRoot;
}