System.Net.FtpWebRequest.FtpWebRequest C# (CSharp) Method

        internal FtpWebRequest(Uri uri)
        {
            if (NetEventSource.IsEnabled) NetEventSource.Info(this, uri);

            if ((object)uri.Scheme != (object)Uri.UriSchemeFtp)
                throw new ArgumentOutOfRangeException(nameof(uri));

            _timerCallback = new TimerThread.Callback(TimerCallback);
            _syncObject = new object();

            NetworkCredential networkCredential = null;
            _uri = uri;
            _methodInfo = FtpMethodInfo.GetMethodInfo(WebRequestMethods.Ftp.DownloadFile);
            if (_uri.UserInfo != null && _uri.UserInfo.Length != 0)
            {
                string userInfo = _uri.UserInfo;
                string username = userInfo;
                string password = "";
                int index = userInfo.IndexOf(':');
                if (index != -1)
                {
                    username = Uri.UnescapeDataString(userInfo.Substring(0, index));
                    index++; // skip ':'
                    password = Uri.UnescapeDataString(userInfo.Substring(index, userInfo.Length - index));
                }
                networkCredential = new NetworkCredential(username, password);
            }
            if (networkCredential == null)
            {
                networkCredential = s_defaultFtpNetworkCredential;
            }
            _authInfo = networkCredential;
        }