c#得到本地ip地址、Mac地址，using哪个命名空间？（整理）

在C#编程中,要获取主机名和主机IP地址,是比较容易的.它提供的Dns类,可以轻松的取得主机名和IP地址.
 
 示例:
 string strHostName = Dns.GetHostName();  //得到本机的主机名
 IPHostEntry ipEntry = Dns.GetHostByName(strHostName); //取得本机IP
 string strAddr = ipEntry.AddressList[0].ToString(); //假设本地主机为单网卡
 
在这段代码中使用了两个类,一个是Dns类,另一个为IPHostEntry类,二者都存在于命名空间System.Net中.
using System.Net

Mac地址的例子

using System;
using System.Management;
using System.Net;

 public class Program
    {
        static void Main(string[] args)
        {
            try
            {
                string ip = "";
                string mac = "";
                ManagementClass mc;
                string hostInfo = Dns.GetHostName();
                //IP地址
                //System.Net.IPAddress[] addressList = Dns.GetHostByName(Dns.GetHostName()).AddressList;这个过时
                  System.Net.IPAddress[] addressList = Dns.GetHostEntry(Dns.GetHostName()).AddressList;
                for (int i = 0; i < addressList.Length; i++)
                {
                    ip = addressList[i].ToString();
                }
                //mac地址
                mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
                ManagementObjectCollection moc = mc.GetInstances();
                foreach (ManagementObject mo in moc)
                {
                    if (mo["IPEnabled"].ToString() == "True")
                    {
                        mac = mo["MacAddress"].ToString();
                    }
                }
                //输出
                string outPutStr = "IP:{0},\n MAC地址:{1}";
                outPutStr = string.Format(outPutStr, ip, mac);
                Console.WriteLine(outPutStr);
            }
            catch (Exception e)
            { }
            Console.ReadLine();
        }
    }