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public class VKUrlManager
    {
        public static string API_URL = "http://api.vkontakte.ru/api.php";
        public static string WithdrawVotes(int iVotes, int iUserID)
        {
            string sTime = "timestamp=" + DateTime.Now.ToFileTimeUtc();
            string sRandom = "random=" + GE.Utils.GetRandom(int.MaxValue);
            return API_URL + "?api_id=" + DA.AppConfig.ApiId
                + "&method=secure.withdrawVotes"
                + "&v=2.0"
                + "&" + sRandom
                + "&" + sTime
                + "&uid=" + iUserID
                + "&votes=" + iVotes
                + "&sig=" + GenerateSig(new string[] 
                    { "api_id=" + DA.AppConfig.ApiId, "v=2.0", "method=secure.withdrawVotes",
                        "uid=" + iUserID, "votes=" + iVotes,
                        sTime,sRandom
                    });
        }
        public static string GenerateSig(string[] aParams)
        {
            Array.Sort(aParams);
            string s = "";
            for(var i = 0; i< aParams.Length; i++)
                s += aParams[i];
            s += DA.AppConfig.ApiSecret;
            return GE.Utils.GetMD5Hash(s);
        }
    }
                                    
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