public static string OptionChoice()
{
string choice = Console.ReadLine();
while (string.IsNullOrEmpty(choice) || string.IsNullOrWhiteSpace(choice))
{
if (!int.TryParse(choice, out int result))
{
Console.Clear();
Console.WriteLine($"That input was not correct for Options");
POS.Options();
choice = Console.ReadLine();
}
else if (result < 1 || result > 4)
{
Console.Clear();
Console.WriteLine($"That input was not correct for Options");
POS.Options();
choice = Console.ReadLine();
}
else
{
choice = result.ToString();
}
}
return(choice);
}
static void Main(string[] args)
{
POS.BookPOS();
}