var dir = new Dictionary<string, string>();

            dir.Add("channelId", "1");

            dir.Add("gameid", "1");

            dir.Add("game_id", "1");

            dir.Add("orderStatus", "1");

            dir.Add("order_no", "1");

            Console.WriteLine(String.Join("&", dir.OrderBy(a => a.Key, new AsciiCompareStrings()).Select(a => string.Format("{0}={1}", a.Key, a.Value))));

//channelId=1&game_id=1&gameid=1&orderStatus=1&order_no=1

            Console.WriteLine(String.Join("&", dir.OrderBy(a => a.Key).Select(a => string.Format("{0}={1}", a.Key, a.Value))));

//channelId=1&game_id=1&gameid=1&order_no=1&orderStatus=1

 

 

 

 

       /// <summary>

        /// ascii码排序

        /// </summary>

        public class AsciiCompareStrings : IComparer<string>

        {

            /// <summary>

            /// 以ascii码从小到大排序

            /// </summary>

            /// <param name="s1"></param>

            /// <param name="s2"></param>

            /// <returns></returns>

            public int Compare(string s1, string s2)

            {

                return string.CompareOrdinal(s1, s2);

            }

        }

 

 

***************************************数组排序实现****************************************

        //将集合key以ascii码从小到大排序

        public static Dictionary<string, string> AsciiDictionary(Dictionary<string, string> sArray)

        {

        

            Dictionary<string, string> asciiDic = new Dictionary<string, string>();

            string[] arrKeys = sArray.Keys.ToArray();

            Array.Sort(arrKeys, string.CompareOrdinal);

            foreach (var key in arrKeys)

            {

                string value = sArray[key];

                asciiDic.Add(key, value);

            }

            return asciiDic;

        }