C# – SpeechRecognitionEngine.InstalledRecognizers returns No recognizer installed

c++speech-recognition

I am trying to get a simple speech recognition program started but it does not work, I've installed some languages (en-GB & en-US) but whenever I use the following:

SpeechRecognitionEngine.InstalledRecognizers

it returns an empty collection. Even when I just try to start a recognizer it will return "no recognizer installed". But when I reinstall a language, it says that it is already installed.

using ( SpeechRecognitionEngine recognizer = new SpeechRecognitionEngine(new System.Globalization.CultureInfo("en-US")))
{
    // Create and load a dictation grammar.
    recognizer.LoadGrammar(new DictationGrammar());

    // Add a handler for the speech recognized event.
    recognizer.SpeechRecognized +=
      new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);

    // Configure input to the speech recognizer.
    recognizer.SetInputToDefaultAudioDevice();

    // Start asynchronous, continuous speech recognition.
    recognizer.RecognizeAsync(RecognizeMode.Multiple);

    // Keep the console window open.
    while (true)
    {
        Console.ReadLine();
    }
}

For what reason is it unable to find the installed recognizers?

Edit:

This is the exception: {System.ArgumentException: No recognizer of the required ID found.
Parameter name: culture
at System.Speech.Recognition.SpeechRecognitionEngine..ctor(CultureInfo culture)

and: var recognizers = SpeechRecognitionEngine.InstalledRecognizers(); returns a collection with a count of 0

Best Solution

The problem was that I installed language packs that can be accessed by Microsoft.Speech and I was using System.Speech, when I switched to Microsoft.Speech it worked.

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