byte[] bytes = Encoding.Unicode.GetBytes(text);
            byte[] hash;

            MemoryStream stream = new MemoryStream();
            stream.WriteByte(0);

            var cripto1 = new CriptoProvider1();
            hash = cripto1.ComputeHash(bytes);

            stream.Write(hash, 0, hash.Length);
            stream.WriteByte(0);

            var cripto2 = new CriptoProvider2();
            hash = cripto2.ComputeHash(bytes);

            stream.Write(hash, 0, hash.Length);


            bytes = stream.ToArray();
            string result = Convert.ToBase64String(bytes);

            return result;