public static string Or(string a, string b)
{
if (HexInt.IsHex(a) && HexInt.IsHex(b))
{
a = String.Join(String.Empty, a.Select(c => Convert.ToString(Convert.ToInt32(c.ToString(), 16), 2).PadLeft(4, '0')));
b = String.Join(String.Empty, b.Select(c => Convert.ToString(Convert.ToInt32(c.ToString(), 16), 2).PadLeft(4, '0')));
return(HexInt.DecToHex(Convert.ToInt32(new string(a.Zip(b, (x, y) => (x == '1' || y == '1') ? '1' : '0').ToArray()), 2)));
}
else
{
throw new ArgumentException();
}
}
