创建控制台应用程序，通过在类中分别定义不同的作用域的字段变量，并访问这些字段，来分析类、子类的作用域

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BClassD
{
    class Program
    {
        public class A
        {
            private int priv=20;
            protected int prot=30;
            
            public void Show()
            {
                Console.WriteLine("private={0}protected={1}", priv, prot);
                Console.WriteLine("父类内容");

            }
        }
        public class B : A
        {
            public void Shownew()
            {
                //priv = 40;
                prot = 50;
                Console.WriteLine("prot:{0}",prot);
                Console.WriteLine("子类内容");
            }
        }
        static void Main(string[] args)
        {
            B b = new B();
            b.Show();
            b.Shownew();
            b.Show();//在继承类中改变变量的值，父类中该变量的值也会改变，同一块内存
            Console.ReadKey();

        }
    }
}

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