Question Prevent errors when the player is not connected to the internet

What's the best way to detect and prevent errors when players aren't connected? In order not only to prevent them but also to be able to display a warning message and whatnot.

If I try to connect while not connected to the internet / WiFi, I get this error:


"WebException: Error: NameResolutionFailure
System.Net.WebConnection.Connect (System.Net.WebOperation operation, System.Threading.CancellationToken cancellationToken) (at <9fe598e1f1334abeae4ea9fbbe948c3e>:0)"

It points to a place in the code where I try to get the public IP:

Code (CSharp):

1. public static string GetPublicIPv4()
2.         {
3.             var ipString = new WebClient().DownloadString("http://icanhazip.com");
4.             return ipString.Replace("\\r\\n", "").Replace("\\n", "").Trim();
5.         }

What bothers me about this exception is that it freezes the game: It still runs but the buttons do not respond.

I don't know if this is the only piece of code that might cause an issue (I'm connecting players locally). But I think it'd be nice to have a way to detect if there's a connection available and only allow the networking code to run when they're connected.

Any piece of advice is highly appreciated.