Getting Arduino LilyPad to switch BlueSmirf v2.11 to/from command mode

// Arduino source code:

void setup () {
  Serial.begin(9600);
}

void loop () {
    Serial.print("$$$");
    delay(2000); // TODO: Inquiry, etc.
    Serial.print("---n");
    delay(100);
    Serial.print("pingn");
    delay(2000);
}

// C# source code (runs on PC)

using System;
using System.IO.Ports;

class Program {

    static void Main () {
        SerialPort p = new SerialPort(
            "COM20", 9600, Parity.None, 8, StopBits.One);
        using (p) {
            p.Open();
            while (p.IsOpen) {
                Console.Write((char) p.ReadChar());
            }
        }
    }
}