No suitable authentication method found to complete authentication (publickey,keyboard-interactive).

 string command = Command.Text;
 StringBuilder result = new StringBuilder();
 try
 {
     var connectionInfo = new KeyboardInteractiveConnectionInfo(server, port, username);

     connectionInfo.AuthenticationPrompt += delegate(object sender1, AuthenticationPromptEventArgs e2)
     {
         foreach (var prompt in e2.Prompts)
         {
             if (prompt.Request.Equals("Password: ", StringComparison.InvariantCultureIgnoreCase))
             {
                 prompt.Response = password;
             }
         }
     };

     using (var client = new SshClient(connectionInfo))
     {
         try
         {
             client.Connect();
             result.Append(client.RunCommand(command).Execute() + "\r\n");
             QAResult.Text = result.ToString();
             client.Disconnect();
         }
         catch (Exception e1)
         {
             result.Append(e1.Message + "\r\n");
             QAResult.Text = result.ToString();
         }
     }
 }
 catch (Exception e1)
 {
     result.Append(e1.Message + "\r\n");
     QAResult.Text = result.ToString();
 }