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 pick the first element of a collection

The `First` and `FirstOrDefault` methods return the first element in a collection. The `First` method throws an exception if the collection is empty. Unlike `First`, `FirstOrDefault` returns a default value if the collection is empty.

Also, `First` and `FirstOrDefault` return the first element of a collection matching a condition.

Let's find the oldest film we have watched. Then, let’s find the oldest one with a low rating.

Learn how to choose one element from a collection using First and FirstOrDefault methods.

Getting Started

LINQ Method: Where

Common LINQ Methods

Syntax & Pitfalls

Refactor with LINQ

What's New in LINQ?

Wrap-up!

First and FirstOrDefault Methods

How to pick the first element of a collection