using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
class MainClass
{
static void Main()
{
int? nullable = 5;
object boxed = nullable;
Console.WriteLine(boxed.GetType());
int normal = (int)boxed;
Console.WriteLine(normal);
nullable = (int?)boxed;
Console.WriteLine(nullable);
nullable = new int?();
boxed = nullable;
Console.WriteLine(boxed == null);
nullable = (int?)boxed;
Console.WriteLine(nullable.HasValue);
}
}