Detecting already used port

[Hayato Iriumi]

I came up with this piece of code to see if the port is being used right
now. I'm wondering if there is more elegant way of detecting already used
port.

try

{

System.Net.IPAddress Addr = Dns.Resolve("localhost").AddressList[0];

m_TcpListener2 = new TcpListener(Addr, 80);

m_TcpListener2.Start();

MessageBox.Show("Cool");

}

catch (Exception exp)

{

MessageBox.Show(exp.Message);

}