What will be the output of the following C# code snippet?

class MyClass
{
    int[] a = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20};
    public IEnumerator GetEnumerator()
    {
        for (int i = 0; i < 20; i++)
        {
            if (a[i] % 2 == 0)
            yield return (int)(a[i]);
        }
    }
}
class Program
{
    static void Main(string[] args)
    {
        MyClass mc = new MyClass();
        foreach (int i in mc)
        Console.Write(i + " ");
        Console.WriteLine();
        Console.ReadLine();
    }
}