SocketError

Enumeration

Indicates the type of error that occurred during a Windows Sockets operation.

Members

• Success

  No error occurred.
  0
• ConnectionAborted

  A connection was forcibly closed by a peer.
  10053
• ConnectionRefused

  A connection attempt failed because the connected party did not properly respond after a period of time or the established connection was broken.
  10061
• HostNotFound

  An underlying network resource or service is not found.
  11001
• InvalidArgument

  An invalid argument was supplied to a Windows Sockets API function.
  10022
• NetworkDown

  A socket operation encountered a dead network.
  10050
• NetworkUnreachable

  An attempt to send data failed because there is no network path to the target host.
  10051
• TimedOut

  A connection attempt failed because the connected party did not properly respond after a period of time.
  10060
• WouldBlock

  A nonblocking socket operation could not be completed immediately.
  10035

try {
    // Attempt to connect to a remote host
    Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
    client.Connect("nonexistent.domain.invalid", 80);
} catch (SocketException se) {
    Console.WriteLine($"Socket error: {se.SocketErrorCode}");
    switch (se.SocketErrorCode)
    {
        case SocketError.ConnectionRefused:
            Console.WriteLine("The connection was refused by the target machine.");
            break;
        case SocketError.TimedOut:
            Console.WriteLine("The connection attempt timed out.");
            break;
        case SocketError.HostNotFound:
            Console.WriteLine("The specified host was not found.");
            break;
        default:
            Console.WriteLine($"An unexpected socket error occurred: {se.Message}");
            break;
    }
}