//EventHandler for showing remote video in ui
        private void Peer_RemoteI420FrameReady(I420AVideoFrame frame)
        {
            lock (remoteVideoLock)
            {
                if (!remoteVideoPlaying)
                {
                    remoteVideoPlaying = true;

                    // Capture the resolution into local variable useable from the lambda below
                    uint width  = frame.width;
                    uint height = frame.height;

                    // Defer UI-related work to the main UI thread
                    RunOnMainThread(() =>
                    {
                        // Bridge the local video track with the local media player UI
                        int framerate            = 30; // for lack of an actual value
                        remoteVideoSource        = CreateI420VideoStreamSource(width, height, framerate);
                        var remoteVideoPlayer    = new MediaPlayer();
                        remoteVideoPlayer.Source = MediaSource.CreateFromMediaStreamSource(remoteVideoSource);
                        Mpe_remoteVideo.SetMediaPlayer(remoteVideoPlayer);
                        remoteVideoPlayer.Play();
                    });
                }
            }
            remoteVideoBridge.HandleIncomingVideoFrame(frame);
        }
        //Suspending-EventHandler of app: executes when app turns into suspending-state
        private void App_Suspending(object sender, SuspendingEventArgs e)
        {
            if (peerConnection != null)
            {
                //Closing of PeerConnection
                peerConnection.Close();
                //Disposing of PeerConnection-Resources
                peerConnection.Dispose();
                peerConnection = null;

                Debugger.Log(0, "", "Peer conection disposed successfully\n");
            }

            //Disposing of MediaPlayers
            Mpe_localVideo.SetMediaPlayer(null);
            Mpe_remoteVideo.SetMediaPlayer(null);

            //Disposing of signaler
            if (signaler != null)
            {
                signaler.StopPollingAsync();
                signaler = null;
            }
        }