Simple Object Oriented Programming (OOP) Concepts with Examples Part 1

Let's begin with a simple base class and derived class, and explain how the both are working.

Let's create a Base Class with the constructor taking no parameters,

        class BaseClass1

        {

            public BaseClass1()

            {

                Console.WriteLine("In BaseClass1 constructor");

            }

        }

 

 And Creating a Derived Class DerivedClass1  which inherits Base class BaseClass1

 

        class DerivedClass1 : BaseClass1

        {

            public DerivedClass1()

            {

                Console.WriteLine("In DerivedClass1 constructor");

            }

        }

And in the Main Function just create an object for the BaseClass1 

            BaseClass1 BC1Obj = new BaseClass1();

Now the output will be 

            In BaseClass1 constructor

While trying to create another object for 

            BaseClass1 BC1Obj2 = new DerivedClass1();

Now the output will be 

            In BaseClass1 constructor
            In DerivedClass1 constructor

While trying to create another object for   

            DerivedClass1 DC1Obj1 = new DerivedClass1();

Now the output will be  

            In BaseClass1 constructor
            In DerivedClass1 constructor

 

This is the order of execution of constructors if we are using inheritance, 

 

A detailed video has been posted in Youtube with the Examples:

https://youtu.be/ojxTJ4FPFnY

 

Source Code Link : https://github.com/oneananda/C_Sharp_Examples/blob/main/OOP_Examples_1/Program.cs

Let's see in the next part