UnBoxing

The unboxing is an explicit conversion from the type object to a value or from an interface type to a value that implements interfaces. The unboxing consists of:

• Checking the object instance to make sure that it is a boxed value of the given value type.
• Copy the value from the instance variable into the value type variable.

Let us have a look on the example:

using System;

using System.Collections.Generic;  
using System.Linq;  
using System.Text;  
  
namespace ConsoleApplication1  
{  
    class unboxing  
    {  
        public static int a
        {  
            get;  
            set;  
        }  
        public static void Main ( )  
        {   
            int i = 10;   
            object j = i;   
   i = (int) j;       //statement for unboxing
Console.WriteLine ("Enter the value: ", a);  
            a= Convert.ToInt32 (Console.ReadLine ( ));  
  
            if (i <= a)  
            {  
                i += a;  
                Console.WriteLine ("\n The sum is: ", i);  
            }  
            else  
            {  
                Console.WriteLine ("\nWrong answer…");  
            }  
            Console.ReadLine ( );  
        }    
    }    
}