LyncServer.cs

using LyncAsyncExtensionMethods;
using Microsoft.Rtc.Collaboration;
using System;
using System.Threading.Tasks;

namespace UCMA_IVR_Demo
{
    public class LyncServer
    {
        private string _appUserAgent = "QnABot";
        private string _appID = "qnabot";
        private CollaborationPlatform _collabPlatform;
        private ApplicationEndpoint _endpoint;
        

        public event EventHandler<EventArgs> LyncServerReady = delegate { };
        public event EventHandler<CallReceivedEventArgs<InstantMessagingCall>> IncomingCall = delegate { };

        public async Task Start()
        {
            try
            {
                Console.WriteLine("Starting Collaboration Platform");
                ProvisionedApplicationPlatformSettings settings = new ProvisionedApplicationPlatformSettings(_appUserAgent, _appID);
                _collabPlatform = new CollaborationPlatform(settings);
                _collabPlatform.RegisterForApplicationEndpointSettings(OnNewApplicationEndpointDiscovered);
                await _collabPlatform.StartupAsync();
                Console.WriteLine("Platform Started");
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error establishing collaboration platform: {0}", ex.ToString());
            }
        }

        public async Task Stop()
        {
            Console.WriteLine("Stopping Lync/SfB Server");
            await _endpoint.TerminateAsync();
            await _collabPlatform.ShutdownAsync();
        }

               private async void OnNewApplicationEndpointDiscovered(object sender, ApplicationEndpointSettingsDiscoveredEventArgs e)
        {
            Console.WriteLine(string.Format("New Endpoint {0} discovered", e.ApplicationEndpointSettings.OwnerUri));
            _endpoint = new ApplicationEndpoint(_collabPlatform, e.ApplicationEndpointSettings);
            _endpoint.RegisterForIncomingCall<InstantMessagingCall>(OnIncomingCall);
            await _endpoint.EstablishAsync();
            Console.WriteLine("Endpoint established");           
            LyncServerReady(this, new EventArgs());
        }

        //new incoming audio call
        private void OnIncomingCall(object sender, CallReceivedEventArgs<InstantMessagingCall> e)
        {
            Console.WriteLine(string.Format("Incoming call! Caller: {0}", e.Call.RemoteEndpoint.Uri));
            IncomingCall(this, e);
        }        
    }
}