How to find Internet connection state in C#

You can use this code sample for finding connection state of network in C# or you can check your network connection.

using System.Runtime.InteropServices;

[DllImport("wininet.dll", CharSet = CharSet.Auto)]
static extern bool InternetGetConnectedState(ref ConnectionState lpdwFlags, int dwReserved);
[Flags]
enum ConnectionState : int { INTERNET_CONNECTION_MODEM = 0x1, INTERNET_CONNECTION_LAN = 0x2, 
            INTERNET_CONNECTION_PROXY = 0x4, INTERNET_RAS_INSTALLED = 0x10, 
            INTERNET_CONNECTION_OFFLINE = 0x20, INTERNET_CONNECTION_CONFIGURED = 0x40 }
 
private bool IsNetConnected()
  {
      ConnectionState conn = new ConnectionState();
      bool IsInternetConnected = InternetGetConnectedState(ref conn, 0);
      return IsInternetConnected;
   }