Book Image

Hands-On Object-Oriented Programming with C#

By : Raihan Taher
Book Image

Hands-On Object-Oriented Programming with C#

By: Raihan Taher

Overview of this book

Object-oriented programming (OOP) is a programming paradigm organized around objects rather than actions, and data rather than logic. With the latest release of C#, you can look forward to new additions that improve object-oriented programming. This book will get you up to speed with OOP in C# in an engaging and interactive way. The book starts off by introducing you to C# language essentials and explaining OOP concepts through simple programs. You will then go on to learn how to use classes, interfacesm and properties to write pure OOP code in your applications. You will broaden your understanding of OOP further as you delve into some of the advanced features of the language, such as using events, delegates, and generics. Next, you will learn the secrets of writing good code by following design patterns and design principles. You'll also understand problem statements with their solutions and learn how to work with databases with the help of ADO.NET. Further on, you'll discover a chapter dedicated to the Git version control system. As you approach the conclusion, you'll be able to work through OOP-specific interview questions and understand how to tackle them. By the end of this book, you will have a good understanding of OOP with C# and be able to take your skills to the next level.
Table of Contents (16 chapters)

Using the throw keyword

Sometimes, in your own program, you have to create exceptions by yourself. No, not to take revenge on the user, but for the sake of your application. Sometimes, there are situations where you need to throw an exception to bypass a difficulty, to log something, or just redirect the flow of the software. Don't worry: by doing this you are not becoming the bad guy; you are actually the hero who is saving the program from trouble. But how can you create an exception? To do that, C# has a keyword called throw. This keyword will help you to create an instance of a type of exception and throw it. Let me show you an example of the throw keyword:

using System;

namespace ExceptionCode
{
class Program
{
public static void Main(string[] args)
{
try
{
Console.WriteLine("You are the boss!");
throw new DivideByZeroException();
}
catch (IndexOutOfRangeException...