C# COM NLA error HRESULT 0x80040202

Ok so I am trying to set up a Network Connection event using NetworkListManager from System.Runtime.InteropServices.ComTypes using this code:

private NetworkListManager nlm; //This is initialized before
private IConnectionPoint icp;
private int cookie = 0;

//This part is wrapped in a function call
Console.WriteLine("Subscribing the INetworkListManagerEvents");
IConnectionPointContainer icpc = (IConnectionPointContainer)nlm;
Guid tempGuid = typeof(INetworkListManagerEvents).GUID;
icpc.FindConnectionPoint(ref tempGuid, out icp);
//The error is thrown in icp.Advise with code 0x80040202
icp.Advise(this, out cookie);

I've already tried searching, but most people are concerned about different matters on this error

The correct way of using the NETWORKLIST is like this:

using NETWORKLIST;

public class Foo : INetworkListManagerEvents 
{
    private NetworkListManager nlm; 
    private IConnectionPoint icp;
    private int cookie = 0;

    public Foo()
    {
        nlm = new NetworkListManager();
        IConnectionPointContainer icpc = (IConnectionPointContainer)nlm;
        Guid tempGuid = typeof(INetworkListManagerEvents).GUID;
        icpc.FindConnectionPoint(ref tempGuid, out icp);
        icp.Advise(this, out cookie);
    }

    //this method must be implemented
    public void ConnectivityChanged(NLM_CONNECTIVITY newConnectivity)
    {
        //Your code goes here
    }
}

What I was doing wrong is that I forgot to implement INetworkListManagerEvents