谷歌翻译API。。。。。。。。。。。。。。。。。。。。。。。。

 /// <summary>
    /// 翻译方法
    /// </summary>
    /// <param name="textstr">需要翻译的内容</param>
    /// <param name="language">被翻译的语言</param>
    /// <param name="tolanguage">翻译成的语言</param>
    /// <returns></returns>
    public static string GetGoogtextStr(string textstr, string language, string tolanguage)
    {

        WebClient web = new WebClient();
        WebHeaderCollection headers = new WebHeaderCollection();
        headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded; charset=utf-8";
        headers[HttpRequestHeader.Referer] = "http://translate.google.cn/";
        web.Headers = headers;
        string text = textstr;
        string url = string.Format("http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q={0}&langpair={1}%7C{2}", text, language, tolanguage);
        byte[] bystr = web.DownloadData(url);
        string urldata = GetText(System.Web.HttpUtility.UrlDecode(bystr, Encoding.UTF8)); //GetText在哪呢？
        return urldata;
    }

[解决办法]
http://code.google.com/apis/ajaxsearch/key.html