boxing - getting an error in unboxing in c# stating name does not exist in current context?

Question

  class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("enter id");
            int id = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("enter name");
            string name = Console.ReadLine();
            Console.WriteLine("price");
            int price = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("enter quantity");
            int quantity = Convert.ToInt32(Console.ReadLine());
            product_demo p1 = new product_demo(id, name, price, quantity);
            p1.diplay();
            Console.Read();
        }
    }
    public class product_demo
    {
        public int id;
        public string name;
        public int price;
        public int quantity;
        public product_demo(int id, string name, int price, int quantity)
        {
            this.id = id;
            this.name = name;
            this.price = price;
            this.quantity = quantity;
            object o1 = id;
            object o2 = name;
            object o3 = price;
            object o4 = quantity;

        }
   
        public void diplay()
        {
            int j = (int)o1; 
            Console.WriteLine("id :");
        }
    }

getting an error while unboxing in display function. boxing is done in product_demo constructor. one more question ; can we define boxing outside any constructor or methods, directly in body of class.

question from:https://stackoverflow.com/questions/65912587/getting-an-error-in-unboxing-in-c-sharp-stating-name-does-not-exist-in-current-c

Answer 1

You have created object o1 in the constructor of product_demo and therefore it exists only within that scope. You need to have your objects within the class (Similar to where you have placed your other variables such as int id, string name, etc.