Is it connected ?

Friend,

Effective way of check it is using WIN API function GetConnectedState() as Ping might not work in some situation ..

using System.Runtime.InteropServices;

[Flags]
enum InternetConnectionState : 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
}

[DllImport("WININET", CharSet=CharSet.Auto)]
public static extern bool InternetGetConnectedState( ref InternetConnectionState lpdwFlags, int dwReserved );

after defining function just use it like normal function it will return True if Computer is connected 
else it will return False .