foreach (var prop in data.GetType().GetFields())
                  {
                      foreach (var attribute in prop.GetCustomAttributes(true))
                      {
                          if (attribute is DataMemberAttribute)
                          {
                              DataMemberAttribute member = attribute as DataMemberAttribute;
                              writer.Write("{0}={1}&", member.Name ?? prop.Name, prop.GetValue(data));
                          }
                      }
                  }