public void Test_00__native <T>(T data)
            where T : unmanaged
        {
            DataStream from = DataStream.FromUnmanaged(data);
            string     b64  = from.ToBase64();
            string     hex  = from.ToHexString();

            byte[] arr = from.ToBytes();

            T t1 = DataStream.FromBytes(arr).ToUnmanaged <T>();
            T t2 = DataStream.FromBase64(b64).ToUnmanaged <T>();
            T t3 = DataStream.FromHex(hex).ToUnmanaged <T>();

            Assert.AreEqual(data, t1);
            Assert.AreEqual(data, t2);
            Assert.AreEqual(data, t3);
        }