INTRODUCTION

Today, I am going to show you how we can call multiple constructors by making a single object in the Main class.

Explanation

My motive to write this code is that I want to show you that how we can call multiple constructors by a single object.

Step 1

In all statements, start with using namespaces, as that is required to implement our code.

Step 2

Then, I used class A, and a public modifier for it,
  • First, I will pass default constructor for class A that will automatically be called while our object is created.
  • Then I will make another constructor having some parameters, [you may pass any parameter]
  • In the second, third, and fourth constructor I will pass int parameters.
  • In the second one, I will pass two parameters, because we cannot pass the same parameter or the same datatype parameter without using overriding.
  • In this program, I will use ''OVERLOADING"
OVERLOADING: HAVING THE SAME NAME BUT DIFFERENT PARAMETERS.

Step 4

I will use new class B, which only has a single constructor.

Step 5

At last, in the main class, I will create an object of class B.

Step 6

You must be thinking that's why I used this keyword with all constructors.

Step 7

Through this keyword we can call a constructor.

Step 8

Use Breakpoint on every constructor, so that you will find how the code is working.
  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Text;
  5. namespace Interfaces {
  6. public class a {
  7. public a(): this(2, 2) {
  8. Console.WriteLine("call 2 parameter method");
  9. }
  10. public a(int a, int b): this(2, 2, 2, 2, 2) {
  11. Console.WriteLine("call 4 parameter method");
  12. }
  13. public a(int a, int b, int c, int d): this(2, 2) {
  14. Console.WriteLine("call 5 parameter method");
  15. }
  16. public a(int a, int b, int c, int d, int e) {
  17. Console.WriteLine("4 parameter");
  18. }
  19. public a(string ABC): this() {
  20. Console.WriteLine("string parameter");
  21. }
  22. }
  23. public class b: a {
  24. public b() {
  25. Console.WriteLine("b parametre");
  26. }
  27. }
  28. class main {
  29. public static void Main() {
  30. b obj = new b();
  31. }
  32. }
  33. }