using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Text;

 using System.Threading.Tasks;

 using System.Net.NetworkInformation;

 using System.Runtime.InteropServices;

 using System.Runtime.InteropServices.ComTypes;

 using System.Diagnostics;

 using NETWORKLIST;

 namespace SharpDisplayManager

 {

 	public class NetworkManager: INetworkListManagerEvents, IDisposable

     {

 		public delegate void OnConnectivityChangedDelegate(NetworkManager aNetworkManager, NLM_CONNECTIVITY aConnectivity);

 		public event OnConnectivityChangedDelegate OnConnectivityChanged;

 		private int iCookie = 0;

         private IConnectionPoint iConnectionPoint;

         private INetworkListManager iNetworkListManager;

 		public NetworkManager()

 		{

 			iNetworkListManager = new NetworkListManager();

 			ConnectToNetworkListManagerEvents();

 		}

 		public void Dispose()

 		{

 			//Not sure why this is not working form here

 			//Possibly because something is doing automatically before we get there

 			//DisconnectFromNetworkListManagerEvents();

 		}

 		public INetworkListManager NetworkListManager

 		{

 			get { return iNetworkListManager; }

 		}

 		public void ConnectivityChanged(NLM_CONNECTIVITY newConnectivity)

 		{

 			//Fire our event

 			OnConnectivityChanged(this, newConnectivity);

 		}

 		public void ConnectToNetworkListManagerEvents()

 		{

 			Debug.WriteLine("Subscribing to INetworkListManagerEvents");

 			IConnectionPointContainer icpc = (IConnectionPointContainer)iNetworkListManager;

 			//similar event subscription can be used for INetworkEvents and INetworkConnectionEvents

 			Guid tempGuid = typeof(INetworkListManagerEvents).GUID;

 			icpc.FindConnectionPoint(ref tempGuid, out iConnectionPoint);

 			iConnectionPoint.Advise(this, out iCookie);

 		}

 		public void DisconnectFromNetworkListManagerEvents()

 		{

 			Debug.WriteLine("Un-subscribing to INetworkListManagerEvents");

 			iConnectionPoint.Unadvise(iCookie);

 		} 

 	}

 }