// @nuget: HtmlAgilityPack

​

using System;

using System.Xml;

using HtmlAgilityPack;

public class Program

{

    public static void Main()

    {

        var html = @"http://eng.jtc.com.tw/product/?mode=data&id=691&top=2";

​

        HtmlWeb web = new HtmlWeb();

​

        var htmlDoc = web.Load(html);

var htmlBody = htmlDoc.DocumentNode.SelectSingleNode("//body");

​

var node = htmlBody.Element("p");

var whatUrLookingFor = htmlDoc.GetElementbyId("content_description").InnerHtml;

Console.WriteLine(whatUrLookingFor);

}

}

​