Text-to-Speech Conversion

using System.Speech.Synthesis;
public class SpeechOutput
{
   private static SpeechSynthesizer speaker;
   public static void Main(String[] args)
   {
      speaker = new SpeechSynthesizer();      
      speaker.SetOutputToDefaultAudioDevice();
      //Speed(-10 - 10)
      speaker.Rate = 1;
      //Volumn (0-100)
      speaker.Volume = 100;
      //Select Voice
      speaker.SelectVoiceByHints(VoiceGender.Female, VoiceAge.Adult);
      //Speak the Text (cancel with speaker.CancelAsync())
      speaker.SpeakAsync("Hello World");
   }

   //Additional methods
   private static List<VoiceInfo> GetInstalledVoices() 
   {
      var listOfVoiceInfo = from voice
                            in  speaker.GetInstalledVoices()
                            select voice.VoiceInfo;
      return listOfVoiceInfo.ToList<VoiceInfo>();
   }
}

using SpeechLib;

SpVoice objSpeech = new SpVoice();
objSpeech.Speak(textBox1.Text,SpeechVoiceSpeakFlags.SVSFlagsAsync);
objSpeech.WaitUntilDone(Timeout.Infinite);