Simple example of whether C # detects ports are occupied

This article mainly introduces the C # detection port is occupied by a simple example, the need for friends can refer to when we want to create a TCP/IP Server connection, we need a range of 1000 to 65535 ports.   But a port on this machine can only be monitored by one program, so we need to detect if the port is occupied when we listen locally.   Namespace System.Net.NetworkInformation defines a class called ipglobalproperties, which we use to get all the listening connections and then determine if the port is occupied, as follows:     Code as follows: public static bool Portinuse (int port) {    bool InUse = false;       Ipglobalproper Ties ipproperties = Ipglobalproperties.getipglobalproperties ();     ipendpoint[] ipendpoints = Ipproperties.getactivetcplisteners ();       foreach (IPEndPoint endPoint in ipendpoints)     {        if (endPoint . Port = port)         {            InUse = true;       & nbsp     break;        }     {      return inUse;       We use the Httplistner class to start a listener on port 8080 and then test if it can be detected, the code is as follows:     code is as follows: static void Main (string[)args) {    HttpListener Httplistner = new HttpListener ();     HTTPLISTNER.PREFIXES.ADD ("http://*:808 0/");     Httplistner.start ();       Console.WriteLine ("port:8080 Status:" + (Portinuse (8080)?) In use ': ' Not in use ');       Console.readkey ();       Httplistner.close (); }