${mapping_RequestException_Tile}
 private void OnFailed(RequestException errorArgs)
 {
     if (Failed != null)
     {
         this.Failed(this, new FailedEventArgs(errorArgs));
     }
 }
 /// <summary>
 /// ${mapping_FailedEventArgs_constructor_D}
 /// </summary>
 /// <param name="error">${mapping_FailedEventArgs_attribute_Error_D}</param>
 public FailedEventArgs(RequestException error)
 {
     this.Error = error;
 }