public XamlMember(XamlTypeInfoProvider provider, string name, string typeName)
 {
     _name     = name;
     _typeName = typeName;
     _provider = provider;
 }
 public XamlUserType(XamlTypeInfoProvider provider, string fullName, Type fullType, IXamlType baseType)
     : base(fullName, fullType)
 {
     _provider = provider;
     _baseType = baseType;
 }