如何在asp.net中获取服务器/网站的IP地址？

string serverIP = HttpContext.Current.Request.ServerVariables["LOCAL_ADDR"];

string serverIP = HttpContext.Current.Request.UserHostAddress;

string serverIP = Dns.GetHostAddresses(HttpContext.Current.Request.ServerVariables["SERVER_NAME"])[0].ToString();

string serverIP = System.Net.Dns.GetHostEntry(HttpContext.Current.Request.ServerVariables["SERVER_NAME"]).AddressList[0].ToString();