How to check Internet status continuously in xamarin.forms

I want to check internet status continuously..so I am using a broadcast receiver class but this is not working if any one has any idea please help me??

I am using this code.

[BroadcastReceiver(Enabled = true)]
[IntentFilter(new[] { "android.net.conn.CONNECTIVITY_CHANGE" })]
[Android.Runtime.Preserve(AllMembers = true)]
public class ConnectivityChangeBroadcastReceiver : BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
if (intent.Action != ConnectivityManager.ConnectivityAction)
return;
CrossConnectivity.Current.ConnectivityChanged += (sender, args) =>
{
page.DisplayAlert("Connectivity Changed", "IsConnected: " + args.IsConnected.ToString(), "OK");
};

        //Check if is connected and raise a custom event or store
        //the current in a static global variable
        var receiver = new ConnectivityChangeBroadcastReceiver();
        Application.Context.RegisterReceiver(receiver, new IntentFilter(ConnectivityManager.ConnectivityAction));
        }
    }