Gain insights into LINQ in C#, learn about lambda expressions, explore common LINQ methods, avoid pitfalls, and refactor code to be more expressive and efficient.

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LINQ is the best feature in C#. If you’re interested in writing more expressive code to work with collections, this course is for you. In this course, you will learn about what LINQ is and what lambda expressions are. You will learn the most common LINQ methods and some common pitfalls to avoid when using LINQ. You will also write your first methods using LINQ and use LINQ to refactor some common constructs.

Getting Started with LINQ in C#

## How to Refactor a chain of conditionals with `FirstOrDefault`

When we need to find a value between multiple choices, we write consecutive `if` statements to check for a valid result every time.

For example, let's find the next film to watch from one of three sources: the latest releases in cinemas, our friends' recommendations, and the all-time classics.

# How to Refactor a chain of conditionals with `FirstOrDefault`

When we need to find a value between multiple choices, we write consecutive `if` statements to check for a valid result every time.

For example, let's find the next film to watch from one of three sources: the latest releases in cinemas, our friends' recommendations, and the all-time classics.

Use the FirstOrDefault method to replace a chain of conditionals.

Getting Started

LINQ Method: Where

Common LINQ Methods

Syntax & Pitfalls

Refactor with LINQ

What's New in LINQ?

Wrap-up!

Replace a Set of Choices with FirstOrDefault

How to Refactor a chain of conditionals with `FirstOrDefault`