string s="",mac="";
// 得到主機(jī)名
string hostinfo = dns.gethostname();

// 得到ip地址
system.net.ipaddress[] addresslist = dns.gethostbyname(dns.gethostname()).addresslist;
for (int i = 0; i < addresslist.length; i ++)
{
    s += addresslist[i].tostring();
}

// 得到mac地址
managementclass mc;
mc=new managementclass("win32_networkadapterconfiguration"); managementobjectcollection moc=mc.getinstances();
foreach(managementobject mo in moc)
{
    if(mo["ipenabled"].tostring()=="true")
        mac=mo["macaddress"].tostring();
}

console.write("主機(jī)名：" + hostinfo);
console.write("ip地址：" + s);
console.write("mac地址：" + mac);