Запись звука с микрофона и сохранение в wav

using NAudio;
using NAudio.Wave;
 
WaveIn waveIn;
WaveFileWriter writer;
string outputFilename = "D:/demo.wav";
 
void waveIn_DataAvailable(object sender, WaveInEventArgs e)
{
    writer.WriteData(e.Buffer, 0, e.BytesRecorded);
}
 
void waveIn_RecordingStopped(object sender, EventArgs e)
{
    waveIn.Dispose();
    waveIn = null;
    writer.Close();
    writer = null;
}
 
private void button1_Click(object sender, EventArgs e)
{
    waveIn = new WaveIn();
    waveIn.DeviceNumber = 0;
    waveIn.DataAvailable += waveIn_DataAvailable;
    waveIn.RecordingStopped += new EventHandler(waveIn_RecordingStopped);
    waveIn.WaveFormat = new WaveFormat(44100, 2);
    writer = new WaveFileWriter(outputFilename, waveIn.WaveFormat);
    waveIn.StartRecording();
}
 
private void button2_Click(object sender, EventArgs e)
{
    waveIn.StopRecording();
}

using System.Runtime.InteropServices;
 
[DllImport("winmm.dll")]
private static extern int mciSendString(string lpstrCommand,
    string lpstrReturnString, int uReturnLength, int hwndCallback);
 
private void button1_Click(object sender, EventArgs e)
{
    mciSendString("open new Type waveaudio Alias recsound", "", 0, 0);
    mciSendString("record recsound", "", 0, 0);
 
    mciSendString("open new Type waveaudio Alias recsound", "", 0, 0);
    mciSendString("set recsound bitspersample 16", "", 0, 0);
    mciSendString("set recsound samplespersec 44100", "", 0, 0);
    mciSendString("record recsound", "", 0, 0);
}
 
private void button2_Click(object sender, EventArgs e)
{
    mciSendString("save recsound c:\\record.wav", "", 0, 0);
    mciSendString("close recsound ", "", 0, 0);
    Computer c = new Computer();
    c.Audio.Stop();
 
    mciSendString("save recsound d:/demo.wma", "", 0, 0);
    mciSendString("close recsound", "", 0, 0);
}
 
private void button3_Click(object sender, EventArgs e)
{
    Computer computer = new Computer();
    computer.Audio.Play("c:\\record.wav", AudioPlayMode.Background);
}

public MainWindow()
        {
            InitializeComponent();
 
            waveIn = new WaveIn();
            waveIn.DeviceNumber = 0;
            waveIn.DataAvailable += waveIn_DataAvailable;
            waveIn.RecordingStopped += new EventHandler(waveIn_RecordingStopped);
            waveIn.WaveFormat = new WaveFormat(8000, 1);
            writer = new WaveFileWriter(outputFilename, waveIn.WaveFormat);
        }
 
        WaveIn waveIn;
        WaveFileWriter writer;
        string outputFilename = "demo.wav";
 
        void waveIn_DataAvailable(object sender, WaveInEventArgs e)
        {
            writer.WriteData(e.Buffer, 0, e.BytesRecorded);
        }
 
        void waveIn_RecordingStopped(object sender, EventArgs e)
        {
            waveIn.Dispose();
            waveIn = null;
            writer.Close();
            writer = null;
        }
 
        private void button1_Click(object sender, RoutedEventArgs e)//Start recording
        {
            
            waveIn.StartRecording();
        }
 
        private void button2_Click(object sender, RoutedEventArgs e)//Stop recording, save
        {
            waveIn.StopRecording();
        }

        private void button4_Click(object sender, EventArgs e)
        {
            saveFileDialog1.Filter = "wav files (*.wav)|*.wav|All files|*.*";
            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                saveFileDialog1.FileName = "запись.wav";
 
            }
        }

private void button1_Click(object sender, EventArgs e)
{
    var sfd = new SaveFileDialog();
    sfd.Filter = "wav files (*.wav)|*.wav|All files|*.*";
    sfd.FileName = "запись.wav";
    if (sfd.ShowDialog() == DialogResult.OK)
    {
    }
}

using Microsoft.VisualBasic;
using Microsoft.VisualBasic.Devices;