c# mp3 download code

 button.Click += async delegate
        {
            var destination = Path.Combine(
                System.Environment.GetFolderPath(
                    System.Environment.SpecialFolder.ApplicationData),
                    "music.mp3");

            await new WebClient().DownloadFileTaskAsync(
                new Uri("http://www.xyz.com/music.mp3"),
                destination);
        };