using System;
using System.ComponentModel;
class MainClass
{
static void Main()
{
Nullable nullable = 5;
object boxed = nullable;
Console.WriteLine(boxed.GetType());
nullable = (Nullable)boxed;
Console.WriteLine(nullable);
nullable = new Nullable();
boxed = nullable;
Console.WriteLine(boxed == null);
nullable = (Nullable)boxed;
Console.WriteLine(nullable.HasValue);
}
}