Robert 的部落格

public static bool IsConnectingServer()
{
 string serverAddress = Properties.Settings.Default.ServerAddress;
 try
 {
 HttpWebRequest request = (HttpWebRequest) WebRequest.Create( serverAddress );
 request.Method = "HEAD";
 HttpWebResponse response = (HttpWebResponse) request.GetResponse();
 return response.StatusCode == HttpStatusCode.OK;
 } catch ( Exception )
 {
 return false;
 }
}

來源:C# Check Remote Server

參考:
Check whether a server is online using an IP and Port
Checking whether the server is on/off