public SSHConnectAct()
    {
    string host = "111.11.11.111";
    string username = "user";
    string password = "password";
    var proxy_host = "222.22.22.2";
    int port = 22;
    int proxy_port = 80;
    PasswordConnectionInfo connectionInfo = new PasswordConnectionInfo(host, port, username, password, ProxyTypes.Http, proxy_host, proxy_port);
    connectionInfo.Timeout = TimeSpan.FromSeconds(30);
    SshClient client = new SshClient(connectionInfo);

    try
        {
        client.Connect();
        if (client.IsConnected)
            {
            client.RunCommand("python3 /path/script.py");
            MessageBox.Show("Скрипт запущен");
            client.Disconnect();
            MessageBox.Show("SSH соединение закрыто");
            }else{
            MessageBox.Show("Соединение не активно");
            }
        }
        catch (Exception e)
        {
        MessageBox.Show("Ошибка подключения "+e);
        }
    }