private void StopRecord(object sender, MouseButtonEventArgs e)
{
string numberrecord = "";
var k = from a in de.VIDEORECORDs
select a;
numberrecord = string.Format("Record{0}", k.Count() + 1);
string desktop = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
playrecord.Visibility = Visibility.Visible;
stoprecord.Visibility = Visibility.Hidden;
RecordAudioSystem.StopRecord();
RecordYourVoice.StopRecord();
ConvertFile.NAudioMp3ToWav("C:\\ShareFolderMusic\\Record\\system.mp3", "C:\\ShareFolderMusic\\Record\\tempt.wav");
ConvertFile.MixWavFiles(new string[] { "C:\\ShareFolderMusic\\Record\\tempt.wav", "C:\\ShareFolderMusic\\Record\\voice.wav" }, string.Format("C:\\ShareFolderMusic\\Record\\{0}_{1}.wav", lbtenbaihat.Text, numberrecord));
string output = desktop + "\\" + lbtenbaihat.Text + "_" + numberrecord + ".wav";
string input = "C:\\ShareFolderMusic\\Record\\" + lbtenbaihat.Text + "_" + numberrecord + ".wav";
File.Copy(input, output);
}