Book Image

Programming in C#: Exam 70-483 (MCSD) Guide

By : Simaranjit Singh Bhalla, SrinivasMadhav Gorthi
Book Image

Programming in C#: Exam 70-483 (MCSD) Guide

By: Simaranjit Singh Bhalla, SrinivasMadhav Gorthi

Overview of this book

Programming in C# is a certification from Microsoft that measures the ability of developers to use the power of C# in decision making and creating business logic. This book is a certification guide that equips you with the skills that you need to crack this exam and promote your problem-solving acumen with C#. The book has been designed as preparation material for the Microsoft specialization exam in C#. It contains examples spanning the main focus areas of the certification exam, such as debugging and securing applications, and managing an application's code base, among others. This book will be full of scenarios that demand decision-making skills and require a thorough knowledge of C# concepts. You will learn how to develop business logic for your application types in C#. This book is exam-oriented, considering all the patterns for Microsoft certifications and practical solutions to challenges from Microsoft-certified authors. By the time you've finished this book, you will have had sufficient practice solving real-world application development problems with C# and will be able to carry your newly-learned skills to crack the Microsoft certification exam to level up your career.
Table of Contents (22 chapters)
17
Mock Test 1
18
Mock Test 2
19
Mock Test 3

Understanding LINQ behind the scenes

Now that we have a fair understanding of LINQ queries, let's consider a scenario in which we need to alter the way LINQ works. For the sake of explanation, let's consider a scenario in which we need to change the built-in implementation of the Where clause in the query.

To do that, we first need to understand how the Where clause works in LINQ queries. We can do this by looking at the definition of the Where clause in Visual Studio. The following is how the definition of the Where clause would appear:

public static IEnumerable<TSource> Where(
this IEnumerable<TSource> source,
Func<TSource, bool> predicate)

Now, to create our own implementation of the Where clause, we will need to create an extension method with the same signature.

Once this is done, we can remove the using statement for System.Linq in the respective...