Syntax :
int i = 123;
object o = i;
 
Program related to Boxing;
class TBoxing
{
    static void Main()
    {
        int i = 123;
 
 
        object o = i;  // boxing concept
 
                i = 456;  
 
       
        System.Console.WriteLine("The value-type value = {0}", i);
        System.Console.WriteLine("The object-type value = {0}", o);
    }
}
 
Unboxing: Unboxing is used to get the value types from the object type. the datatype must be same for the variable that we have assigned during boxing.
 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace ConsoleApplication9
{
    class Program
    {
        static void Main(string[] args)
        {
            int i = 123;
            object o = i; // boxing concept
            i = 456;
            int j = (int)o;//unboxing concept
 
            Console.WriteLine("The value-type value = {0}", i);
            Console.WriteLine("The value-type value = {0}", j);
            Console.ReadLine();
 
        }
    }
}