System.Xml.Serialization.XmlSerializationReader.GetXsiType C# (CSharp) Method

        protected XmlQualifiedName GetXsiType()
        {
            string type = _r.GetAttribute(_typeID, _instanceNsID);
            if (type == null)
            {
                type = _r.GetAttribute(_typeID, _instanceNs2000ID);
                if (type == null)
                {
                    type = _r.GetAttribute(_typeID, _instanceNs1999ID);
                    if (type == null)
                        return null;
                }
            }
            return ToXmlQualifiedName(type, false);
        }