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

static void Main(string[] args)
{
    int x = 0;  
    while (x < 20)
    {
        while (x < 10)
        {
            if (x % 2 == 0)
            {
                Console.WriteLine(x);
            }
            x++;
        }
    }
    Console.ReadLine();
}