Check Network Connection

I want to check if network connection is available (cross platform). I am trying to use xamarin.forms.labs INetwork. I put "SetIoc" in my android activity from here https://github.com/XForms/Xamarin-Forms-Labs/blob/master/samples/Xamarin.Forms.Labs.Sample.Droid/MainActivity.cs.
Then, in my "core" class I set

var network= await Resolver.Resolve().Network;

Now, how have I to set IsReachable method?
I can't use it in the right way..