方法隐藏如何在C#中起作用？

public class Animal
{
    public virtual void MakeSound()
    {
        Console.WriteLine("The animal makes a sound.");
    }
}

public class Dog : Animal
{
    public override void MakeSound()
    {
        Console.WriteLine("The dog barks.");
    }
}

public class Cat : Animal
{
    public override void MakeSound()
    {
        Console.WriteLine("The cat meows.");
    }
}

public class Program
{
    public static void Main(string[] args)
    {
        Animal dog = new Dog();
        Animal cat = new Cat();

        dog.MakeSound();
        cat.MakeSound();
    }
}