Example of how to Check Internet Connection in Xamarin.Forms applications - http://julianocustodio.com/check-internet

MainPage.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:DemoCheckInternet"
             x:Class="DemoCheckInternet.MainPage">

    <StackLayout VerticalOptions="Center" 
                 HorizontalOptions="Center">
        
        <Label x:Name="Status"
               FontSize="20"/>
        
        <Button Text="Verify" Clicked="VerifyInternet"/>

    </StackLayout>
</ContentPage>