public class SHAHelper
    {
        public static string HashStringSHA2(params string[] inputString)
        {
            string val = inputString.Aggregate("", (current, s) => current + s);


            return HashString(val, "SHA256");
        }
        
        public static string HashString(string inputString, string hashName)
        {
            HashAlgorithm algorithm = HashAlgorithm.Create(hashName);
            if (algorithm == null)
            {
                throw new ArgumentException("Unrecognized hash name", "hashName");
            }
            byte[] hash = algorithm.ComputeHash(Encoding.UTF8.GetBytes(inputString));
            return Convert.ToBase64String(hash);
        }


        public static bool IsSameSHA2(string hashCode, params string[] inputString)
        {
            if (string.IsNullOrWhiteSpace(hashCode))
            {
                return false;
            }


            return hashCode.Equals(HashStringSHA2(inputString), StringComparison.OrdinalIgnoreCase);
        }
    }