C# speech to text

using System;
using System.Globalization;
using System.Speech.Recognition;
using System.Threading;

namespace DefaultInput
{
  class Program
  {
    // Indicate whether asynchronous recognition has finished.
    static bool completed;

    static void Main(string[] args)
    {
      using (SpeechRecognitionEngine recognizer =
        new SpeechRecognitionEngine(new CultureInfo("en-US")))
      {

        // Create and load the exit grammar.
        Grammar exitGrammar = new Grammar(new GrammarBuilder("exit"));
        exitGrammar.Name = "Exit Grammar";
        recognizer.LoadGrammar(exitGrammar);

        // Create and load the dictation grammar.
        Grammar dictation = new DictationGrammar();
        dictation.Name = "Dictation Grammar";
        recognizer.LoadGrammar(dictation);

        // Attach event handlers to the recognizer.