C# 百度百科查找信息

using HtmlAgilityPack;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;

namespace ConsoleApplication4
{
  /// <summary>
  /// 
  ///娱乐百度百科
  ///风之痕 20150821
  /// </summary>
    class Program
    {
       
        public static void Main(string[] args)
        {

            while (true) {
                Console.WriteLine("欢迎来到TOP小百科，请输入您的问题：");
                string key= Console.ReadLine();
                ASK(key);

            }
            Console.ReadKey();
        }
        private static void ASK(string key) {
            try
            {
                string uri = "http://baike.baidu.com/search/word?word=" + key;



                HttpWebRequest HttpWReq = (HttpWebRequest)WebRequest.Create(uri);



                HttpWReq.Timeout = 10000;

                HttpWebResponse HttpWResp = (HttpWebResponse)HttpWReq.GetResponse();

                StreamReader sr = new StreamReader(HttpWResp.GetResponseStream(), System.Text.Encoding.GetEncoding("UTF-8"));
                HtmlDocument doc = new HtmlDocument();
                doc.Load(sr);
                var kwBox = doc.DocumentNode.SelectSingleNode("//div[@class=‘para‘]");
                Console.WriteLine(kwBox.InnerText);
                Console.WriteLine("");
                sr.Close();
                sr.Dispose();
                HttpWResp.Close();
            }
            catch {
                Console.WriteLine("抱歉您的问题没有答案");
                Console.WriteLine("");
            }
            
        }
    
    }
}