System.Xml.XmlDocument.SetDefaultNamespace C# (CSharp) Method

        internal void SetDefaultNamespace(String prefix, String localName, ref String namespaceURI)
        {
            if (prefix == strXmlns || (prefix.Length == 0 && localName == strXmlns))
            {
                namespaceURI = strReservedXmlns;
            }
            else if (prefix == strXml)
            {
                namespaceURI = strReservedXml;
            }
        }