How to capture video using front camera in windows phone using c#

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C#

Windows

XAML

camera

I am working on windows phone app, In which i need to capture video using front camera. I am able to capture video using back camera but couldn't find a way to capture video with front camera using c#. Kindly Give me an idea that how can i achieve my task ,your help would be appreciated.
Thanks in Advance.

public partial class Movies : PhoneApplicationPage
    {
        
        VideoBrush myvideobrush;      //for capturing video.
        CaptureSource myvideosource;  //source for capturing video.
        VideoCaptureDevice mydevice;  //device for capturing video.
        FileSink myfilesink;          //for storing the video.
        private string isoVideoFileName = "CameraMovie.mp4";
        private IsolatedStorageFileStream isoVideoFile;
        

        public Movies()
        {

            InitializeComponent();
            if (myvideosource == null)
            {
                myvideosource = new CaptureSource();
                myfilesink = new FileSink();
                mydevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
               
                //System.Collections.ObjectModel.ReadOnlyCollection<System.Windows.Media.VideoCaptureDevice> supportedcams = CaptureDeviceConfiguration.GetAvailableVideoCaptureDevices();
                //mydevice = supportedcams.ElementAt(0);
            }
            if (mydevice != null)
            {
                myvideobrush = new VideoBrush();

                myvideobrush.SetSource(myvideosource);
                viewFinderRectangle.Fill = myvideobrush;
                stop_btn.IsEnabled = false;
                myvideosource.Start();
            }

        }
        public void startReccording()
        {
            start_btn.IsEnabled = false;
            stop_btn.IsEnabled = true;


            if (myvideosource.VideoCaptureDevice != null && myvideosource.State == CaptureState.Started)
            {
                myvideosource.Stop();
                myfilesink.CaptureSource = myvideosource;
                myfilesink.IsolatedStorageFileName = isoVideoFileName;
            }
            if (myvideosource.VideoCaptureDevice != null && myvideosource.State == CaptureState.Stopped)
            {

                myvideosource.Start();
            }
        }
        public void stopRecording()
        {


            if (myvideosource.VideoCaptureDevice != null && myvideosource.State == CaptureState.Started)
            {
                myvideosource.Stop();

                myfilesink.CaptureSource = null;
                myfilesink.IsolatedStorageFileName = null;
                videoPriview();
            }



        }
        public void videoPriview()
        {

            if (isoVideoFile != null)
            {
                videoPlayer.Play();
            }
            else
            {
                myvideosource.Stop();
                viewFinderRectangle.Fill = null;
                isoVideoFile = new IsolatedStorageFileStream(isoVideoFileName, FileMode.Open, FileAccess.Read, IsolatedStorageFile.GetUserStoreForApplication());
                videoPlayer.SetSource(isoVideoFile);
                videoPlayer.Play();
            }
            start_btn.IsEnabled = true;
            stop_btn.IsEnabled = false;

        }


        private void movies_goback_btn_Click(object sender, RoutedEventArgs e)
        {
            NavigationService.GoBack();
        }

        private void start_btn_Click(object sender, RoutedEventArgs e)
        {
            startReccording();
        }

        private void stop_btn_Click(object sender, RoutedEventArgs e)
        {
            stopRecording();
        }
    }