public void Should_Align()
        {
            var stream = new BitStream();

            stream.Write((UInt2)2);
            stream.Write((UInt4)7);
            // 6 bits written
            Assert.AreEqual(UInt2.BitSize + UInt4.BitSize, stream.BitsPosition);
            // align the bits (write 2 0 bits)
            stream.Align();
            // write a full byte.
            stream.WriteByte(0xFF);

            var bytes = stream.ToArray();

            // 01 + 1110 = 30
            // 1111 1111 = 255
            Assert.AreEqual(new byte[] { 30, 255 }, bytes);
        }