C# OO - Private - Access Modifiers

Program.cs

using System;

namespace LearnCS
{
    class Storage {
        private string someString = "Something Simple";
        private int privID = 5;

        public int MultiBy2() {
            return (privID * 2);
        }

        public string DoubleIt() {
            return (someString + " " + someString);
        }
    }
   
    class Program
    {
        static void Main(string[] args)
        {

            Storage p1 = new Storage();
            //Console.WriteLine(p1.someString);

            Console.WriteLine(p1.MultiBy2());
            Console.WriteLine(p1.DoubleIt());

            Console.ReadLine();
        }
    }
}