/// <summary>
 /// Register a namespace and prefix to use
 /// </summary>
 /// <param name="uri"></param>
 /// <param name="prefix"></param>
 public virtual void RegisterNamespace(string prefix, string uri)
 {
     NamespaceManager.RegisterNamespace(prefix, uri);
 }
 /// <copydocfrom cref="IXmlMappingEngine.RegisterNamespace" />
 public void RegisterNamespace(string xmlPrefix, string xmlNamespace)
 {
     NamespaceManager.RegisterNamespace(xmlPrefix, xmlNamespace);
 }