MOBILE_API/Common/Extension/StringExtension.cs

using System;

namespace Common.Extension
{
    public static class StringExtension
    {
        public static string ToVirtualKeyDecryptString(this string cipher,string key="") {
            try
            {
                mTranskeyServerComLib.MTranskeySrvLib lib = new mTranskeyServerComLib.MTranskeySrvLib();
                //string decode = lib.RS_MTK_Decrypt(key, cipher);
                string decode = lib.RS_MTK_DecryptSecureData(cipher);
                return decode;
            }
            catch (Exception ex){
                return "";
            }
        }
    }
}