System.Net.FtpWebRequest.RequestCallback C# (CSharp) Метод

        internal void RequestCallback(object obj)
        {
            if (_async)
                AsyncRequestCallback(obj);
            else
                SyncRequestCallback(obj);
        }

 protected void InvokeRequestCallback(object? obj)
 {
     WebRequest? webRequest = _request;
     if (webRequest != null)
     {
         FtpWebRequest ftpWebRequest = (FtpWebRequest)webRequest;
         ftpWebRequest.RequestCallback(obj);
     }
 }