1 error in code :)

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using SpeechLib;
using System.Speech.Recognition;

namespace SpeechToTextTest
{
    public partial class Form1 : Form
    {
        private SpeechRecognitionEngine withEventsField_sre;

        public SpeechRecognitionEngine sre
        {
            get { return withEventsField_sre; }
            set
            {
                if (withEventsField_sre != null)
                {
                    withEventsField_sre.LoadGrammarCompleted -= sre_LoadGrammarCompleted;
                    withEventsField_sre.SpeechHypothesized -= sre_SpeechHypothesized;
                    withEventsField_sre.SpeechRecognitionRejected -= sre_SpeechRecognitionRejected;
                    withEventsField_sre.SpeechRecognized -= sre_SpeechRecognized;
                }
                withEventsField_sre = value;
                if (withEventsField_sre != null)
                {
                    withEventsField_sre.LoadGrammarCompleted += sre_LoadGrammarCompleted;
                    withEventsField_sre.SpeechHypothesized += sre_SpeechHypothesized;
                    withEventsField_sre.SpeechRecognitionRejected += sre_SpeechRecognitionRejected;
                    withEventsField_sre.SpeechRecognized += sre_SpeechRecognized;
                }
            }

        }



        public Form1()
        {
            Load += Form1_Load;
            InitializeComponent();
            sre = new SpeechRecognitionEngine();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            string[] words = new string[] { "Kathy S" };
            Choices c = new Choices(words);
            GrammarBuilder grmb = new GrammarBuilder(c);
            Grammar grm = new Grammar(grmb);
            sre.LoadGrammar(grm);
        }


        private void btnLiterate_Click(object sender, EventArgs e)
        {
            if (TextBox1.Text.Trim.Length == 0)
                return;
            sre.SetInputToWaveFile(TextBox1.Text);
            RecognitionResult r = default(RecognitionResult);
            r = sre.Recognize();
            if (r == null)
            {
                TextBox2.Text = "Could not fetch result";
                return;
            }
            TextBox2.Text = r.Text;
        }

        private void Button1_Click(object sender, EventArgs e)
        {
            TextBox1.Text = string.Empty;

            OpenFileDialog fileDlg = new OpenFileDialog();
            //wave As WaveFile()

            if (fileDlg.ShowDialog() == DialogResult.OK)
            {
                //wave = New WaveFile(fileDlg.FileName)

                TextBox1.Text = "Reading .WAV file...";

                //wave.Read()

                TextBox1.Text = OpenFileDialog1.FileName;
                //TextBox1.Text = "Finished Reading .WAV file..."

                //m_DrawWave = True

                Refresh();
            }

        }

        private void sre_LoadGrammarCompleted(object sender, System.Speech.Recognition.LoadGrammarCompletedEventArgs e)
        {
        }

        private void sre_SpeechHypothesized(object sender, System.Speech.Recognition.SpeechHypothesizedEventArgs e)
        {
            System.Diagnostics.Debug.Print(e.Result.Text);
        }

        private void sre_SpeechRecognitionRejected(object sender, System.Speech.Recognition.SpeechRecognitionRejectedEventArgs e)
        {
            System.Diagnostics.Debug.Print("Rejected: " + e.Result.Text);
        }

        private void sre_SpeechRecognized(object sender, System.Speech.Recognition.SpeechRecognizedEventArgs e)
        {
            System.Diagnostics.Debug.Print(e.Result.Text);
        }

        private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
        {

        }

    }
}