C# checking Internet connection [duplicate]

Question

Can you please tell me if there is a way to check if there is a internet connection in my computer when my C# program is running. For a simple example, if internet is working, I would output a message box saying Internet is available. else I would output a message saying, Internet is unavailable.

Without using the library function to see if network is available (since this doesn't check internet connectivity)

System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable() 

Or without opening a webpage and seeing if it's return data

using (WebClient client = new WebClient())       htmlCode = client.DownloadString("http://google.com"); 

Because both of these above methods don't suit my needs.

Answer 1

a little shorter version:

public static bool CheckForInternetConnection() {     try     {         using (var client = new WebClient())         using (var stream = client.OpenRead("http://www.google.com"))         {             return true;         }     }     catch     {         return false;     } } 

Another option is:

Ping myPing = new Ping(); String host = "google.com"; byte[] buffer = new byte[32]; int timeout = 1000; PingOptions pingOptions = new PingOptions(); PingReply reply = myPing.Send(host, timeout, buffer, pingOptions); if (reply.Status == IPStatus.Success) {   // presumably online } 

You can find a broader discussion here

Answer 2

Consider the following code snippet...

Ping myPing = new Ping(); String host = "google.com"; byte[] buffer = new byte[32]; int timeout = 1000; PingOptions pingOptions = new PingOptions(); PingReply reply = myPing.Send(host, timeout, buffer, pingOptions); if (reply.Status == IPStatus.Success)  {   // presumably online } 

Good Luck!