public partial class FormMain : Form
    {
        public FormMain()
        {
            InitializeComponent();
        }

private void FormMain_Load(object sender, EventArgs e)
        {
            GetVoices();
        }

private void GetVoices()
        {
            SpVoice voice = new SpVoiceClass();
            ISpeechObjectTokens voices = voice.GetVoices("", "");
            var list = new List<string>();
            foreach (ISpeechObjectToken token in voices)
                list.Add(token.GetDescription(0));
            cbSpeechType.DataSource = list;
        }

private void btnSpeechText_Click(object sender, EventArgs e)
        {
            SpeechText(null);
        }

private void SpeechText(string fileName)
        {
            Cursor = Cursors.WaitCursor;
            SpFileStream stream = null;
            SpVoice voice = new SpVoiceClass();
            if (fileName + "" != "")
            {
                stream = new SpFileStreamClass();
                stream.Open(fileName, SpeechStreamFileMode.SSFMCreateForWrite, false);
                voice.AudioOutputStream = stream;
            }
            voice.Voice = voice.GetVoices("", "").Item(cbSpeechType.SelectedIndex);
            voice.Volume = tbVol.Value;
            voice.Rate = tbSpeechSpeed.Value;
            voice.Speak(tbText.Text, SpeechVoiceSpeakFlags.SVSFDefault);
            if (fileName + "" != "" && stream != null)
                stream.Close();
            Cursor = Cursors.Arrow;
        }

private void btnRecordSpeech_Click(object sender, EventArgs e)
        {
            Cursor = Cursors.WaitCursor;
            using (var saveFileDialog = new SaveFileDialog())
            {
                saveFileDialog.FileName = "MyVoice.wav";
                saveFileDialog.Filter = "Wave (*.wav)|*.wav";
                if (saveFileDialog.ShowDialog() == DialogResult.OK)
                {
                    SpeechText(saveFileDialog.FileName);
                }
            }
            Cursor = Cursors.Arrow;
        }
    }