编辑代码

using System;

public class HelloWorld
{
    public static void Main()
    {
       int i=10;
       object obj=i;
       if(obj is int){
           Console.WriteLine("the value of i is boxing!");
       }
       i=20;
       Console.WriteLine($"int:i={i}");
       Console.WriteLine($"object:obj={obj}");
    }
}