static void addhostheader(int siteid,string ip, int port, string domain)
        {
            directoryentry site = new directoryentry("iis://localhost/w3svc/"+siteid);
            propertyvaluecollection serverbindings = site.properties["serverbindings"];
            string headerstr = string.format("{0}:{1}:{2}",ip,port,domain);
            if (!serverbindings.contains(headerstr))
            {
                serverbindings.add(headerstr);
            }
            site.commitchanges();
        }
     在找到append a host header by code in iis之前，我通過(guò)下面的代碼沒(méi)找到"serverbindings"屬性，走了一些彎路。

directoryentry site = new directoryentry("iis://localhost/w3svc/1/root");
     代碼很簡(jiǎn)單，需要說(shuō)明的是siteid，默認(rèn)站點(diǎn)是1，對(duì)于非默認(rèn)站點(diǎn)，通過(guò)查看站點(diǎn)日志文件名就可以知道。