Answer 1

Answer 2

为了获得实际的IP地址：

// Using the RemoteEndPoint property.
Console.WriteLine (
"I am connected to " + IPAddress.Parse (((IPEndPoint)s.RemoteEndPoint).Address.ToString ()) + 
"on port number " + ((IPEndPoint)s.RemoteEndPoint).Port.ToString ());

// Using the LocalEndPoint property.
Console.WriteLine (
"My local IpAddress is :" + IPAddress.Parse (((IPEndPoint)s.LocalEndPoint).Address.ToString ()) +
"I am connected on port number " + ((IPEndPoint)s.LocalEndPoint).Port.ToString ());

取自msdn网站：

Answer 3