Array..

        private void Work()
        {
            byte[] Array_ = new byte[255];
            for (int i = 0; i < 255; i++)
            {
                label1.Invoke(new MethodInvoker(delegate
                {
                    label1.Text = i.ToString();
                }));
                Array_[i] = (byte)0xFF;
            }
            alert(BitConverter.ToString(Array_));
        }