using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplicationSecondTry
{
class Program
{
static void Main(string[] args)
{
/*
* We have two classes A and B.
* Class B inherits class B.
* if we create object of class A (
Which points to the class A // A O = new
A(); // ) then
* We can call and access the base
class (Class A) Methods and data members
*/
A O = new A();
O.Method_In_A();
O.a = 20;
/*
* We have two classes A and B.
* Class B inherits class B.
* if we create object of class A (
Which points to the class B // A O1 =
new B(); // ) then
* We can call and access the base
class (Class A) Methods and data members
* In this case the constructor of
base class is called and we can assign the value to base class public data
members(Inheritance - Is relationship ).
*/
A O1 = new B();
O1.a = 30;
O1.Method_In_A();
/*
* We have two classes A and B.
* Class B inherits class B.
* if we create object of class B (
Which points to the class B // B O2 =
new B(); // ) then have access to all public methods and data members.
*/
B O2 = new B();
O2.a = 50;
O2.b = 60;
O2.Method_In_A();
O2.Method_In_B();
/*
* We have two classes A and B.
* Class B inherits class B.
* if we create object of class B (
Which points to the class A // B O3 =
new A(); // ) then we get error as an explicit conversion exist (Inheritance
concept).
* below line will not work.
*/
//B O3 = new A();
Console.ReadLine();
}
}
class A
{
public int a = 10;
public A()
{
Console.WriteLine("Constructor
Of A");
}
public A(int i)
{
i
= a;
Console.WriteLine("Param
Constructor Of A", i);
}
public void
Method_In_A()
{
Console.WriteLine("Method
in A Called.");
}
}
class B : A
{
public int b = 10;
public B()
{
Console.WriteLine("Constructor
Of B");
}
public B(int i)
{
i
= b;
Console.WriteLine("Param
Constructor Of B", i);
}
public void
Method_In_B()
{
Console.WriteLine("Method
in B Called.");
}
}
}
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