How can I hide a base class public property in the derived class

Question

I want to hide the base public property(a data member) in my derived class:

class Program
{
    static void Main(string[] args)
    {
        b obj = new b()         


        

Answer 1

namespace PropertyTest    
{    
    class a
    {    
        int nVal;

        public virtual int PropVal
        {
            get
            {
                return nVal;
            }
            set
            {
                nVal = value;
            }
        }
    }

    class b : a
    {
        public new int PropVal
        {
            get
            {
                return base.PropVal;
            }
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            a objA = new a();
            objA.PropVal = 1;

            Console.WriteLine(objA.PropVal);

            b objB = new b();
            objB.PropVal = 10; // ERROR! Can't set PropVal using B class obj. 
            Console.Read();
        }
    }
}