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How to resolve the "Bad packet length" error in SSH.NET?

I am trying to upload files via SFTP using SSH.NET . SFTPClient.Connect()throws an SshConnectionException with the message "Bad packet length 1302334341." This is my code:

static void Main()
{
try
{
 SftpClient sftp = new SftpClient(server, 22, userID, password);
 sftp.Connect();
}
catch(Exception e)
{
 Console.WriteLine(e.Message);
}
}

I saw in another discussion that this is probably related to encryption. I am using AES and I have a host key. However, I do not understand how to enter encryption. Based on this discussion, I played with this:

ConnectionInfo connectionInfo = new PasswordConnectionInfo(server, 22, userID, password);
connectionInfo.Encryptions.Clear();
connectionInfo.Encryptions.Add("aes","ssh-rsa 2048 11:22:34:d4:56:d6:78:90:01:22:6b:46:34:54:55:8a")

I know that the correct set of arguments for accessing Encryptions.Add () is not correct, but I got a little lost in using this library; can you help me figure out how to set the encryption correctly (assuming that the problem)?

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, . ,

foreach (var d in connectionInfo.Encryptions.Where(p => p.Key != "aes128-cbc").ToList()) 
{
 connectionInfo.Encryptions.Remove(d.Key); 
}

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