Yea.Compression.BitArrayCompress.AndNot C# (CSharp) Method

        public BitArrayCompress AndNot(BitArrayCompress op)
        {
            lock (_lock)
            {
                uint[] left;
                uint[] right;
                Prelogic(op, out left, out right);

                for (int i = 0; i < left.Length; i++)
                    left[i] &= ~right[i];

                return new BitArrayCompress(Type.Uncompressed, left);
            }
        }