C# 处理URL地址

calendarset.do?start=1548518400&end=1552147200&_=1546421856958
calendarset.do?start=1550937600&end=1554566400&_=1546421856959
calendarset.do?start=1553961600&end=1557590400&_=1546421856960
calendarset.do?start=1556380800&end=1560009600&_=1546421856961
calendarset.do?start=1553961600&end=1557590400&_=1546421856962
calendarset.do?start=1550937600&end=1554566400&_=1546421856963
calendarset.do?start=1548518400&end=1552147200&_=1546421856964

 private void button3_Click(object sender, EventArgs e)
        {
            var str = textBox1.Text;
            string[] temp = str.Split(new char[] { '\t' }, StringSplitOptions.RemoveEmptyEntries);

            List<string> list = new List<string>();
            for (int i = 0; i < temp.Length; i++)
            {
                var test = temp[i];
                list.Add(HandleWithParameterUrl(test));
            }
            MessageBox.Show("完成");
        }
        /// <summary>
        /// 处理带参数的URL
        /// </summary>
        /// <param name="WithParameterUrl">参参数的URL</param>
        /// <returns>参数+备注, 具体看代码</returns>
        public string HandleWithParameterUrl(string WithParameterUrl)
        {
            var result = ""; var url = ""; var parameter = "";
            var index = WithParameterUrl.IndexOf("?");
            url = WithParameterUrl.Substring(0, index);
            parameter = WithParameterUrl.Substring(index + 1);
            string[] temp = parameter.Split(new char[] { '&' }, StringSplitOptions.RemoveEmptyEntries);
            for (int i = 0; i < temp.Length; i++)
            {
                index = temp[i].IndexOf("=");
                var key = temp[i].Substring(0, index);
                var value = temp[i].Substring(index + 1);
                var remaks = HandleTimeStamp(value);
                result += key + "=" + value + ":" + remaks + "\r\n"; //输出三个参数
            }
            return result;
        }
        /// <summary>
        /// 处理时间戳
        /// </summary>
        /// <param name="TimeStamp">时间戳</param>
        /// <returns>时间字符串</returns>
        public string HandleTimeStamp(string TimeStamp)
        {
            if (TimeStamp.Length == 10)
            {
                TimeStamp = TimeStamp + "000";
            }

            //long jsTimeStamp = 1478169023479;//13
            //var length1 = jsTimeStamp.ToString().Length; //13
            //var lenght2 =  TimeStamp.Length; //10

            long jsTimeStamp = Convert.ToInt64(TimeStamp);
            System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1)); // 当地时区
            DateTime dt = startTime.AddMilliseconds(jsTimeStamp);
            return dt.ToString("yyyy/MM/dd HH:mm:ss:ffff");
        }