Voice Recording/Mic Testing and Playing Recorded Sound in Windows Phone Silverlight 8.1

Mainpage.Xaml

<phone:PhoneApplicationPage x:Class="MicrophoneTest.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone" xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" FontFamily="{StaticResource PhoneFontFamilyNormal}" FontSize="{StaticResource PhoneFontSizeNormal}" Foreground="{StaticResource PhoneForegroundBrush}" SupportedOrientations="Portrait" Orientation="Portrait" shell:SystemTray.IsVisible="True">
    <!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot" Background="LightBlue">
        <Image x:Name="ScanComp" HorizontalAlignment="Left" Height="170" Margin="156,235,0,0" VerticalAlignment="Top" Width="170" />
        <TextBlock Name="timerMsg" Margin="10,460,10,257" TextAlignment="Center" Foreground="White" FontSize="24"></TextBlock>
        <TextBlock Name="timedisplayBlock" Margin="206,508,221,209" Foreground="White" FontSize="40"></TextBlock>
        <Button Name="btnstart" Content="start" Click="recordButton_Click" Margin="0,636,0,58"></Button>
    </Grid>
</phone:PhoneApplicationPage>

Mainpage.xaml.cs

public partial class MainPage: PhoneApplicationPage
{
    // Constructor
    int currentcount;
    Microphone microphone = Microphone.Default;
    byte[] buffer;
    MemoryStream stream = new MemoryStream();
    SoundEffect sound;
    DispatcherTimer recordingTimer;
    public MainPage()
    {
        InitializeComponent();
        recordingTimer = new DispatcherTimer();
        recordingTimer.Interval = new TimeSpan(0, 0, 0, 1, 0);
        recordingTimer.Tick += new EventHandler(recordingTimer_Tick);
    }
    private void recordButton_Click(object sender, EventArgs e)
    {
        Startrecording();
    }
    protected async void Startrecording()
    {
        ScanComp.Source = new BitmapImage(new Uri(@ "Assets/scan_microphone.png", UriKind.Relative));
        timerMsg.Text = "Speak something to test recording.";
        currentcount = 10;
        recordingTimer.Start();
        DispatcherTimer dt = new DispatcherTimer();
        dt.Interval = TimeSpan.FromMilliseconds(33);
        dt.Tick += delegate
        {
            try
            {
                FrameworkDispatcher.Update();
            }
            catch
            {}
        };
        dt.Start();
        microphone.BufferReady += new EventHandler < EventArgs > (microphone_BufferReady);
        microphone.BufferDuration = TimeSpan.FromMilliseconds(1000);
        buffer = new byte[microphone.GetSampleSizeInBytes(microphone.BufferDuration)];
        microphone.Start();
        await Task.Delay(TimeSpan.FromSeconds(10));
        if (microphone.State == MicrophoneState.Started)
        {
            microphone.Stop();
        }
        timerMsg.Text = "playing sound...";
        sound = new SoundEffect(stream.ToArray(), microphone.SampleRate, AudioChannels.Mono);
        sound.Play();
    }
    void microphone_BufferReady(object sender, EventArgs e)
    {
        microphone.GetData(buffer);
        stream.Write(buffer, 0, buffer.Length);
    }
    private void recordingTimer_Tick(object sender, EventArgs e)
    {
        timedisplayBlock.Text = currentcount--.ToString();
        if (currentcount == 0)
        {
            recordingTimer.Stop();
            timedisplayBlock.Text = "";
            timerMsg.Text = "playing sound...";
        }
    }
}