/// 

/// Pings a variation of websites defined in a array and checks for connectivity.
/// 

/// True if a ping succeeded, False if otherwise.
/// 
public bool isConnectionAvailable()
{
    string[] sitesList = { "www.google.com", "www.microsoft.com" , "www.psychocoder.net" };
    Ping ping = new Ping();
    PingOptions options = new PingOptions();
    PingReply reply;
    int notReturned = 0;
     try
        {
            for (int i = 0; i <= sitesList.Length; i++)
            {
                reply = ping.Send(sitesList[i], 10);
                if (reply.Status != IPStatus.Success)
                {
                    notReturned += 1;
                }
                // Couldn't ping any of the hostnames.
                if (notReturned == sitesList.Length)
                {
                    //throw an exception
                    throw new Exception(@"There doesn't seem to be a network/internet connection.\r\nPlease contact your system administrator");
                }
                else
                {
                    return true;
                }
            } 
    }
    catch (Exception ex)
    {
        return false;
    }
}