C# Passing Values to Base Class Constructor

Program

using System;

namespace AboutClasses

{

    class PassingValuesToBaseClassConstructor

    {

        class NumbersBase

        {

            int p, q;

            public NumbersBase(int x, int y)

            {

                this.p = x;

                this.q = y;

            }

            public void displayValues()

            {

                Console.WriteLine("Value of base class p is {0}", p);

                Console.WriteLine("Value of base class q is {0}", q);

            }

        }

        class NumbersDerived : NumbersBase

        {

            public int x, y;

            public NumbersDerived(int n1, int n2, int n3, int n4) :                                                                   base(n1, n2)

            {

                this.x = n3;

                this.y = n4;

            }

            public void displayNumbers()

            {

                Console.WriteLine("Value of derived class x is {0}", x);

                Console.WriteLine("Value of derived class y is {0}", y);

            }

        }

        static void Main(string[] args)

        {

            NumbersDerived nx = new NumbersDerived(10, 20, 30, 40);

            nx.displayValues();

            nx.displayNumbers();

            Console.ReadKey();

        }//Main

    }//Main Class

}//Namespace

Output

Value of base class p is    10
Value of base class q is    20
Value of derived class x is 30
Value of derived class y is 40