public void ToAndFromHexTest()
        {
            for (int i = -100000; i <= 1000000; i += 37)
            {
                var hex = i.ToHex();
                var i2  = IntExtensions.FromHex(hex);
                Assert.AreEqual(i, i2, hex);
            }

            Assert.AreEqual(int.MinValue, IntExtensions.FromHex(int.MinValue.ToHex()));
            Assert.AreEqual(int.MaxValue, IntExtensions.FromHex(int.MaxValue.ToHex()));
        }