New Post: How to deal with the error stream when using ShellStream

        string input = String.Empty;
        string output = String.Empty;
        bool isFirst = true;
 
       private void SSHConnect()
        {
            client = new SshClient("172.19.118.141", "trade", "trade");
            client.ConnectionInfo.Encoding = ASCIIEncoding.Default;
            client.Connect();
            ShellStream shells = client.CreateShellStream("test", 80, 24, 800, 600, 1024);
            input = "ping 127.0.0.1 -c 5";
            shells.DataReceived += new EventHandler<Renci.SshNet.Common.ShellDataEventArgs>(shells_DataReceived); 
            shells.Expect(new Regex(@"\$ $")); 
            shells.WriteLine(input);
            shells.Expect(new Regex(@"\$ $")); 
            client.Disconnect();
        }

        void shells_DataReceived(object sender, Renci.SshNet.Common.ShellDataEventArgs e)
        {
            string newline = (client.ConnectionInfo.Encoding.GetString(e.Data));
            if (newline.Contains('\n'))
            {
                Regex regex = new Regex(@"\[.*@.*\][\$|\#]");
                string[] str = newline.Split('\n');
                for (int i = 0; i < str.Length; i++)
                {
                    output += str[i];
                    var match = regex.Match(output);
                    if (output.StartsWith("Last login") || match.Success || output == String.Empty)
                    { output = String.Empty; continue; }
                    if (isFirst && output == input)
                    { output = String.Empty; isFirst = false; continue; }
                    Console.WriteLine(output);
                    output = String.Empty;
                }
            }
            else
                output += newline;
        }