1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | public class InternetCS{ [DllImport("wininet.dll")] private extern static bool InternetGetConnectedState(out int Description, int ReservedValue); public static bool IsConnectedToInternet() { int Desc; return InternetGetConnectedState(out Desc, 0); }}private void button1_Click(object sender, EventArgs e){ if InternetCS.IsConnectedToInternet() == true { MessageBox.Show("bağlantı var"); }} |