Key Exchange Negotiation Failed

Hi Folks,

I am using the latest NuGet package - 2023.0.1 in a .NET 6 console app. Below is the stack trace.

Code:

               var password = _encryptionManager.Decrypt(sftpSetting.EncryptedUserPassword);
                ConnectionInfo connectionInfo;
                var methods = new List<AuthenticationMethod>
                {
                    new PasswordAuthenticationMethod(sftpSetting.Username,password)
                };
                connectionInfo = new ConnectionInfo(sftpSetting.HostName, sftpSetting.Port, sftpSetting.Username, methods.ToArray());

                using (var sftpClient = new Renci.SshNet.SftpClient(connectionInfo))
                {
                    sftpClient.HostKeyReceived += (sender, e) =>
                    {
                        e.CanTrust = GetHostFingerPrint(sftpSetting).Equals(e.FingerPrintSHA256);
                    };
                    sftpClient.Connect();
                    sftpClient.UploadFile(fileStream, remotePath);
                    sftpClient.Disconnect();
                } 

Stack Trace:

Renci.SshNet.Common.SshConnectionException
HResult=0x80131500
Message=Key exchange negotiation failed.
Source=Renci.SshNet
StackTrace:
at Renci.SshNet.Security.KeyExchange.Finish()
at Renci.SshNet.Security.KeyExchangeECDH.Finish()
at Renci.SshNet.Session.MessageListener()
--- End of stack trace from previous location ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Renci.SshNet.Session.WaitOnHandle(WaitHandle waitHandle, TimeSpan timeout)
at Renci.SshNet.Session.Connect()
at Renci.SshNet.BaseClient.CreateAndConnectSession()
at Renci.SshNet.BaseClient.Connect()

Is there anything I can do to workaround this issue? Thank you!

EDIT:
To add to the scenario, I have no issues connecting and uploading using a WinSCP client with the same configuration used above.

Start with the .NET 6 connection code at SftpClient.Connect and the KeyExchangeECDH.Finish stack-trace entry. Compare the SSH negotiation configuration with the working WinSCP setup and identify the missing compatibility detail. Done means a reproducible cause and a documented workaround or confirmed fix.