Enterprise Applications with C# and .NET: Develop robust, secure, and scalable applications using.NET and C#

Cover Page....2

Title Page....3

Copyright Page....4

Dedication Page....5

About the Author....6

About the Reviewers....7

Acknowledgement....8

Preface....9

Errata....14

Table of Contents....18

1. Introduction to .NET....27

Introduction....27

Structure....27

Objectives....27

Tools and environment setup....27

Installing Visual Studio....28

Installing Visual Studio Code....29

Introduction to Visual Studio....30

Introduction to Visual Studio Code....32

Understanding multi-platform concepts....35

Overview of principal project types in .NET....36

Conclusion....51

Points to remember....52

Multiple-choice questions....52

Answers....52

Questions....53

2. Status of the .NET Platform....54

Introduction....54

Structure....54

Objectives....54

History of the .NET platform....54

The .NET Core versions....58

From .NET Core to .NET 7....67

Conclusion....69

Points to remember....69

Multiple choice questions....69

Answers....70

Questions....70

Key terms....70

3. Cross-platform Applications....72

Introduction....72

Structure....72

Objectives....72

Asp.Net Core applications for Linux....72

Self-contained executables....80

Conclusion....83

Points to remember....84

Multiple choice questions....84

Answers....85

Questions....85

Key terms....85

4. The Object-Oriented Programming....86

Introduction....86

Structure....86

Objectives....87

Classes, constructors, and methods....87

Encapsulation....91

Inheritance....91

Reusability....92

Polymorphism....93

Partial class....95

Constructor....98

Static classes and methods....101

Structs....103

Interfaces....105

SOLID Principles....108

Conclusion....110

Points to remember....110

Multiple Choice Questions....111

Answers....111

Questions....111

5. Interfaces and Inheritance in C#....113

Introduction....113

Structure....113

Objectives....113

Implementation of interfaces....114

Multiple interfaces....119

Testability of interfaces....122

Dependency injection....124

Inheritance in C# language....127

Conclusion....131

Points to Remember....132

Multiple Choice Questions....132

Answers....133

Questions....133

6. Basic Concepts of Design Patterns....135

Introduction....135

Structure....135

Objectives....135

General concepts of design patterns....136

Singleton pattern....136

Façade pattern....140

Adapter pattern....143

Observer pattern....145

Builder pattern....150

Factory pattern....152

Conclusion....154

Points to remember....154

Multiple Choice Questions....155

Answers....155

Questions....155

7. Operators, Loops, and Iterations in C#....157

Introduction....157

Structure....157

Objectives....157

Object types in C#....157

Loops, operation, and iterations....165

While statement....166

Do-while statement....166

For loop....167

Foreach statement....169

Operators....170

Arithmetic operators....170

Switch case statement....179

Points to remember....182

Conclusion....182

Multiple choice questions....182

Answers....183

Questions....183

8. Error Handling and Exceptions in C#....185

Introduction....185

Structure....185

Objectives....185

The try-catch blocks....185

Most common exceptions in C#....190

Error handling strategy options....192

Conclusion....194

Points to remember....194

Multiple choice questions....194

Answers....195

Questions....195

9. Using and Understanding LINQ....197

Introduction....197

Structure....197

Objectives....197

LINQ fundamentals....197

Query expressions....198

Points to remember....208

Conclusion....208

Multiple choice questions....209

Answers....210

Questions....210

10. Unit Tests....211

Introduction....211

Structure....211

Objectives....211

Unit Test Concept....212

xUnit tool for .NET....213

Test-driven development (TDD)....222

Points to Remember....225

Conclusion....225

Multiple Choice Questions....226

Answers....226

Questions....226

11. New Features in C# 8.0 and 9.0....228

Introduction....228

Structure....228

Objectives....228

New features in C# 8.0....228

New features in C# 9.0....237

Points to remember....242

Conclusion....243

Multiple Choice Questions....243

Answers....244

Questions....244

12. Building .NET Applications for Linux....245

Introduction....245

Structure....245

Objectives....245

Advantages of multi-platform concepts....245

Market opportunities....247

Maintainability....247

Hiring process....247

Security....248

System integrations....248

Fewer costs....248

.NET projects available for Linux....249

Developing .NET applications with WSL 2....252

Conclusion....258

Points to remember....258

Multiple choice questions....259

Answers....259

Questions....259

Key terms....260

13. Asp.Net Core Web API....261

Introduction....261

Structure....261

Objectives....261

Asp.Net Core Web API project....261

HTTP Verbs....262

Creating a Web API project....263

Minimal APIs....283

Conclusion....287

Points to remember....288

Multiple-choice questions....288

Answers....288

Questions....288

14. Blazor, the Single Page Application of .NET....290

Introduction....290

Structure....290

Objectives....290

Concepts of single-page applications....291

Difference between Blazor Server and Blazor Web Assembly....294

Razor components and data binding....309

JavaScript Interop....315

Conclusion....317

Points to remember....317

Multiple-choice questions....318

Answers....318

Questions....318

15. Desktop, Console, and Mobile Applications....320

Introduction....320

Structure....320

Objectives....320

Native application development....321

Windows Forms....322

Windows Presentation Foundation (WPF)....328

Universal Windows Platform (UWP)....335

Mobile development....341

Console applications....348

Conclusion....349

Points to remember....350

Multiple-choice questions....350

Answers....351

Questions....351

16. Azure Integration Services....352

Introduction....352

Structure....352

Objectives....352

Azure storage accounts....353

Creating an Azure storage account....353

Azure functions....364

Conclusion....379

Points to remember....380

Multiple-choice questions....380

Answers....381

Questions....381

17. Authentication in Asp.Net Core....382

Introduction....382

Structure....382

Objectives....382

Authentication concepts....383

Authentication and authorization for Web APIs....383

Basic authentication....386

JWT authentication....389

Conclusion....397

Points to remember....398

Multiple-choice questions....398

Answers....399

Questions....399

18. Introduction to Entity Framework Core....400

Introduction....400

Structure....400

Objectives....400

Object Relational Mapping (ORM)....401

Entity Framework Core....403

LINQ....420

Conclusion....422

Points to remember....422

Multiple-choice questions....422

Answers....423

Questions....423

19. Good Practices for .NET Applications....425

Introduction....425

Structure....425

Objectives....425

Dependency injection....426

Logging....433

Performance....435

Exception handling....437

Conclusion....437

Points to remember....437

Multiple-choice questions....437

Answers....438

Questions....438

20. Architecture Concepts for .NET Applications....439

Introduction....439

Structure....439

Objectives....440

Architecture practices for web applications....440

Migration to the cloud....440

Single Page Applications (SPAs)....441

Cloud applications....442

Azure App Service and containers....442

Serverless compute....443

Azure Kubernetes Service (AKS)....443

DevOps....443

Introduction to microservices....444

Design pattern concepts....446

Conclusion....447

Points to remember....448

Questions....448

21. Creating an Enterprise Application in .NET....449

Introduction....449

Structure....449

Objectives....449

Application requirements....450

Creating the application....451

Creating the models....454

Entity Framework configuration....457

Creating the Business Logic layer....463

Creating the Controllers....469

Creating the front-end....475

Container type components....477

Country components....484

Port components....491

Customer components....498

Booking components....504

Conclusion....512

Points to remember....512

Questions....513

Index....514

Building enterprise applications is a complex task that requires a comprehensive understanding of the latest technologies and programming languages. C# and .NET are powerful tools that have become increasingly popular in enterprise development.This book will help you build enterprise-grade applications with C# and .NET. It covers a wide range of topics, including the basics of C# programming, advanced concepts such as object-oriented programming, and the use of the .NET platform for building robust and scalable applications. You will also explore the best practices and design patterns for building enterprise applications.By the end of the book, you will be able to create a full enterprise application by applying all the given concepts across the entire book, including TDD, database access, security, authentication, modern architecture, and the new features of C#.

What you will learn

• Create Asp.Net Core web applications based on Razor pages.
• Build cross-platform desktop and mobile apps using .NET.
• Learn how to integrate your .NET app with the most important features of Azure.
• Using multiple databases in ASP.NET Core via Entity Framework Core.
• Explore different Architectural patterns in .NET.

Who this book is for

This book is for developers who are new to C# and .NET and want to build enterprise applications. This is also for experienced developers who want to expand their knowledge of these technologies and improve their skills in building robust and reliable applications.