asp.net Get server information

Response.Write("服务器机器名：" + Server.MachineName);
Response.Write("<br/>");
Response.Write("服务器IP地址：" + Request.ServerVariables["LOCAL_ADDR"]);
Response.Write("<br/>");
Response.Write("服务器域名：" + Request.ServerVariables["SERVER_NAME"]);
Response.Write("<br/>");
Response.Write(".NET解释引擎版本：" + ".NET CLR" + System.Environment.Version);
Response.Write("<br/>");
Response.Write("服务器操作系统版本：" + System.Environment.OSVersion.ToString());
Response.Write("<br/>");
Response.Write("服务器IIS版本：" + Request.ServerVariables["SERVER_SOFTWARE"]);
Response.Write("<br/>");
Response.Write("HTTP访问端口：" + Request.ServerVariables["SERVER_PORT"]);
Response.Write("<br/>");
Response.Write("虚拟目录的绝对路径：" + Request.ServerVariables["APPL_RHYSICAL_PATH"]);
Response.Write("<br/>");
Response.Write("执行文件的绝对路径：" + Request.ServerVariables["PATH_TRANSLATED"]);
Response.Write("<br/>");
Response.Write("Session总数：" + Session.Contents.Count.ToString());
Response.Write("<br/>");
Response.Write("Application总数：" + Application.Contents.Count.ToString());
Response.Write("<br/>");
Response.Write("缓存Cache总数：" + Cache.Count.ToString());
Response.Write("<br/>");
Response.Write("服务器主机：" + Request.ServerVariables["HTTP_HOST"]);
Response.Write("<br/>");
Response.Write("服务器区域语言：" + Request.ServerVariables["HTTP_ACCEPT_LANGUAGE"]);
Response.Write("<br/>");
Response.Write("访客信息：" + Request.ServerVariables["HTTP_USER_AGENT"]);
Response.Write("<br/>");
Response.Write("服务器CPU个数：" + System.Environment.GetEnvironmentVariable("NUMBER_OF_PROCESSORS"));
Response.Write("<br/>");
Response.Write("服务器CPU类型：" + System.Environment.GetEnvironmentVariable("PROCESSOR_IDENTIFIER"));

You may ask that the values ​​of HTTP_HOST and SERVER_NAME are the same, what is the difference between them?
Usually the default server port is 80, HTTP_HOST will be omitted and the port number will not be displayed. If the server is not port 80, HTTP_HOST displays the port number.
Simply put: HTTP_HOST = SERVER_NAME:SERVER_PORT