利用谷歌翻譯API實現(xiàn)谷歌翻譯函數(shù)：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security;
using System.Text.RegularExpressions;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string text = "Artificial intelligence is a branch of computer science. Artificial intelligence is a branch of computer science.";
            string text1 = "Artificial [intelligence] is a branch of computer science.";
            string text2 = "Artificial intelligence is a branch of computer science Tom said.";
            Console.WriteLine(googleTranslation(text));
            Console.WriteLine(googleTranslation(text1));
            Console.WriteLine(googleTranslation(text2));
        }

        public static string googleTranslation(string text)
        {
            if (text == "" || text == null)
            {
                return "";
            }
            else
            {
                string result = "";
                string url = "https://translate.google.cn/translate_a/single?client=gtx&sl=en&tl=zh-CN&dt=t&q=" + text;
                string jsonData = GetInfo(url);
                string pattern = "\"([^\"]*)\"";
                int count = Regex.Matches(jsonData, pattern).Count;
                MatchCollection matches = Regex.Matches(jsonData, pattern);
                for (int i = 0; i < count - 1; i += 2)
                {
                    result += matches[i].Value.Trim().Replace("\"", "");
                }


                return result;
            }
        }
        public static bool InChinese(string StrChineseString)
        {
            return Regex.IsMatch(StrChineseString, ".*[\\u4e00-\\u9faf].*");
        }
        public static string GetInfo(string url)
        {
            ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
            //訪問http方法  
            string strBuff = "";
            Uri httpURL = new Uri(url);
            ///HttpWebRequest類繼承于WebRequest咖祭，并沒有自己的構(gòu)造函數(shù)济欢，需通過WebRequest的Creat方法建立，并進行強制的類型轉(zhuǎn)換     
            HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(httpURL);
            ///通過HttpWebRequest的GetResponse()方法建立HttpWebResponse,強制類型轉(zhuǎn)換     
            HttpWebResponse httpResp = (HttpWebResponse)httpReq.GetResponse();
            ///GetResponseStream()方法獲取HTTP響應(yīng)的數(shù)據(jù)流,并嘗試取得URL中所指定的網(wǎng)頁內(nèi)容     
            ///若成功取得網(wǎng)頁的內(nèi)容，則以System.IO.Stream形式返回诡右，若失敗則產(chǎn)生ProtoclViolationException錯誤琅翻。在此正確的做法應(yīng)將以下的代碼放到一個try塊中處理。這里簡單處理     
            Stream respStream = httpResp.GetResponseStream();
            ///返回的內(nèi)容是Stream形式的揣钦，所以可以利用StreamReader類獲取GetResponseStream的內(nèi)容获询，并以     
            //StreamReader類的Read方法依次讀取網(wǎng)頁源程序代碼每一行的內(nèi)容，直至行尾（讀取的編碼格式：UTF8）     
            StreamReader respStreamReader = new StreamReader(respStream, Encoding.UTF8);
            strBuff = respStreamReader.ReadToEnd();
            return strBuff;
        }
        public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {
            //直接確認拐袜，否則打不開  
            return true;
        }
    }
}