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); }