Book Image

.NET Design Patterns

By : Praseed Pai, Shine Xavier
Book Image

.NET Design Patterns

By: Praseed Pai, Shine Xavier

Overview of this book

Knowing about design patterns enables developers to improve their code base, promoting code reuse and making their design more robust. This book focuses on the practical aspects of programming in .NET. You will learn about some of the relevant design patterns (and their application) that are most widely used. We start with classic object-oriented programming (OOP) techniques, evaluate parallel programming and concurrency models, enhance implementations by mixing OOP and functional programming, and finally to the reactive programming model where functional programming and OOP are used in synergy to write better code. Throughout this book, we’ll show you how to deal with architecture/design techniques, GoF patterns, relevant patterns from other catalogs, functional programming, and reactive programming techniques. After reading this book, you will be able to convincingly leverage these design patterns (factory pattern, builder pattern, prototype pattern, adapter pattern, facade pattern, decorator pattern, observer pattern and so on) for your programs. You will also be able to write fluid functional code in .NET that would leverage concurrency and parallelism!
Table of Contents (22 chapters)
.NET Design Patterns
Credits
Foreword
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

Strategy pattern in the .NET BCL


The strategy pattern (aka policy pattern) is a design pattern where we can choose algorithms depending upon the context. The pattern is intended to provide a means to define a family of algorithms encapsulated as an object to make them interchangeable. The strategy pattern lets the algorithms vary independently from the clients that use them.

The Array and the ArrayList classes provide the capability to sort objects contained in them through the Sort method. One can use different strategies to sort by leveraging the strategy design pattern-based API provided by the .NET BCL. The designers of .NET Framework have given us the IComparer<T> interface to provide a sorting strategy. Array and ArrayList provide the capability to sort the objects contained in the collection via the Sort method. Strategy design pattern is used with Array and Arraylist to enable sorting using different strategies, without changing any client code, via an IComparable interface...