speech recognition - No response from my C# program -

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the program works using speech recognition, , based on jarvis.. want able use different languages speech recognition, such danish , english. problem don't response. cant seem figure out if response or if speech detected , read.

public partial class form1 : form {     speechrecognitionengine _recognizer = new speechrecognitionengine();     speechsynthesizer dexter = new speechsynthesizer();     string qevent;     string procwindow;     double timer = 10;     int count = 1;     random rnd = new random();      public form1()     {         initializecomponent();     }      private void form1_load(object sender, eventargs e)     {         _recognizer.setinputtodefaultaudiodevice();         _recognizer.loadgrammar(new dictationgrammar());         _recognizer.loadgrammar(new grammar(new grammarbuilder(new choices(file.readalllines(@"c:\commands.txt")))));         _recognizer.speechrecognized += new eventhandler<speechrecognizedeventargs>(_recognizer_speechrecognized);         _recognizer.recognizeasync(recognizemode.multiple);     }      void _recognizer_speechrecognized(object sender, speechrecognizedeventargs e)     {         int rannum = rnd.next(1, 10);         string speech = e.result.text;         switch (speech)         {             //greetings             case "hey dexter":             case "hej dexter":                 if (rannum < 6) { dexter.speak("hej sir"); }                 else if (rannum > 5) { dexter.speak("hej"); }                 break;              case "shut down dexter":             case "luk ned dexter":                 dexter.speak("så ses vi");                 close();                 break;              case "dexter":                 if (rannum < 5) { qevent = ""; dexter.speak("ye sir"); }                 else if (rannum > 4) { qevent = ""; dexter.speak("ye"); }                 break;         }     } }


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