Boxing

namespace Boxing
{
    class Program
    {
        static void Main(string[] args)
        {
            object obj = DateTime.Now;

            DateTime datetime = (DateTime)obj;

            Console.WriteLine(datetime);

            Console.ReadKey();
        }
    }
}
using System;
class BoxingExample
{
    static void Main()
    {
        int i = 123;
        object o = i;    // Boxing
        int j = (int)o;  // Unboxing
    }
}