C#调用百度翻译API实现一个翻译功能

using System;
using System.Net;
using System.Web.Security;
using System.Web.Script.Serialization;

namespace TranslatorOfWang
{
    class TranslateFunction
    {
        public static string Translate(string content)
        {
            string languageFrom = "en", languageTo = "zh";
            if (Translate(content, languageFrom, languageTo).Error_code == null)
            {
                return Translate(content, languageFrom, languageTo).Trans_result[0].Dst;
            }
            else
                return Translate(content, languageFrom, languageTo).Error_msg;
        }
        public static PostResult Translate(string content, string languageFrom, string languageTo)
        {
            string appId = "2018111519456789", passWord = "gMk8wEKxENvbpUcvFxxx", randomNum = new Random().Next().ToString();
            string md5Sign = FormsAuthentication.HashPasswordForStoringInConfigFile(appId + content + randomNum + passWord, "MD5").ToLower();
            string FullRequest = "http://api.fanyi.baidu.com/api/trans/vip/translate?q=" + content + "&from=" + languageFrom + "&to=" + languageTo + "&appid=" + appId + "&salt=" + randomNum + "&sign=" + md5Sign;
            string m_Content = new WebClient().DownloadString(FullRequest);
            PostResult m_postResult = new JavaScriptSerializer().Deserialize<PostResult>(m_Content);
            return m_postResult;
        }
        public  class PostResult{
            public string Error_code { set; get; }
            public string Error_msg { set; get; }
            public string From { set; get; }
            public string To { set; get; }
            public TranslateContent[] Trans_result { set; get; }
        }
        public class TranslateContent
        {
            public string Src { set; get; }
            public string Dst { set; get; }
        }
    }
}

        public void ReadAndTranslate()
        {
            string TextName = “TBTxtName.txt”;
            string path = "File/";
            StreamReader sr = new StreamReader(path + TextName + ".txt", Encoding.Default);
            StreamWriter m_SW = new StreamWriter(path + DateTime.Now.ToString("yyyymmddhhmm") + "TransLated" + ".txt", true);

            //去除符号重新定义句子
            string xx = sr.ReadToEnd();
            string[] split = xx.Split(new char[] { '.','!','?', ';', ',', ':' });

            string content;
            for (int i = 0; i < split.Length; i++)
            {
                content = split[i];
                if (content != null & content != "" & content != " " & content != "\n" & content != "\t" & content != "\r")
                {
                    string line = TranslationFunction.Translate(content);
                    m_SW.WriteLine(line);
                    //m_SW.WriteLine(content);
                }
            }
            m_SW.Dispose();
            m_SW.Close();
        }