A simple tutorial on how to check if Internet is available inside a Unity app. It uses the Unity method to check if the network card is enabled and also uses pings to a couple of websites.
Full video tutorial available on Youtube:
https://youtu.be/I0HyNTJLxK4
gleygames/CheckInternetAvailability-Unity
Simple tutorial about how to check if internet is available not just if the network connection is enabled for Unity
C#