using System;
public class Program
{
public static void Main()
DateOnly? first = null;
DateOnly? second = new DateOnly(2022, 9, 28);
Console.WriteLine(first == null);
Console.WriteLine(second == null);
bool? firstBool = null;
bool? secondBool = false;
Console.WriteLine(firstBool == null);
Console.WriteLine(secondBool == null);
}