public static void Main()
var meal = Food.Cheese | Food.Cake;
private static void WhatFood(Food meal)
if((meal & Food.Cookies) == Food.Cookies)
Console.WriteLine("Mmm cookies");
if((meal & Food.Cheese) == Food.Cheese)
Console.WriteLine("Mmm cheese");
if((meal & Food.Cake) == Food.Cake)
Console.WriteLine("Mmm cake");