PACKAGE

using System.Speech.Synthesis;

// Initialize a new instance of the SpeechSynthesizer.
SpeechSynthesizer synth = new SpeechSynthesizer();

// Configure the audio output.
synth.SetOutputToDefaultAudioDevice();

// Speak a string, synchronously
synth.Speak("Hello World!");

// Speak a string asynchronously
var prompt = synth.SpeakAsync("Goodnight Moon!");

while (!prompt.IsCompleted)
{
    Console.WriteLine("speaking...");
    Thread.Sleep(500);
}

// Create a new SpeechRecognitionEngine instance.
using SpeechRecognizer recognizer = new SpeechRecognizer();
using ManualResetEvent exit = new ManualResetEvent(false);

// Create a simple grammar that recognizes "red", "green", "blue", or "exit".
Choices choices = new Choices();
choices.Add(new string[] { "red", "green", "blue", "exit" });

// Create a GrammarBuilder object and append the Choices object.
GrammarBuilder gb = new GrammarBuilder();
gb.Append(choices);

// Create the Grammar instance and load it into the speech recognition engine.
Grammar g = new Grammar(gb);
recognizer.LoadGrammar(g);

// Register a handler for the SpeechRecognized event.
recognizer.SpeechRecognized += (s, e) =>
{
    Console.WriteLine($"Recognized: {e.Result.Text}, Confidence: {e.Result.Confidence}");
    if (e.Result.Text == "exit")
    {
        exit.Set();
    }
};

// Emulate
Console.WriteLine("Emulating \"red\".");
recognizer.EmulateRecognize("red");

Console.WriteLine("Speak red, green, blue, or exit please...");

exit.WaitOne();