C#微信公众平台接入示例代码

        /// <summary>
        /// 对字符串进行SHA1加密
        /// </summary>
        /// <param name="strIN">需要加密的字符串</param>
        /// <returns>密文</returns>
        public string SHA1_Encrypt(string Source_String)
        {
            byte[] StrRes = Encoding.Default.GetBytes(Source_String);
            HashAlgorithm iSHA = new SHA1CryptoServiceProvider();
            StrRes = iSHA.ComputeHash(StrRes);
            StringBuilder EnText = new StringBuilder();
            foreach (byte iByte in StrRes)
            {
                EnText.AppendFormat("{0:x2}", iByte);
            }
            return EnText.ToString();
        }

            List<String> strs = new List<string>();
            strs.Add(token);
            strs.Add(timestamp);
            strs.Add(nonce);
            strs.Sort();//这里进行字典排序
            string GetStr = "";
            strs.ForEach(a => GetStr += a);//得到排序后的字符串