Solution For Error 1
sre.SpeechRecognized +=new EventHandler<SpeechRecognizedEventArgs>(sre_SpeechRecognized);
Solution For Error 2
You make "SpeechDetectedEventArgs" method
void sre_SpeechRecognized(object sender, SpeechDetectedEventArgs e)
ANd you have to make "SpeechRecognizedEventArgs" method
private void sre_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
And Your third Error will solve automatically