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#

# What are indices and ranges?

Starting from C# version 8.0, we have two new operators: the index from the end operator (`^`) and the range operator (`..`).

With the index from the end operator (`^`), we can access elements from the end of arrays---for example, the last element of an array would be `myArray[^1]`. Before, we had to use the length of the array to access elements from the end with `myArray[myArray.Length - 1]`.

On the other hand, with the range operator (`..`) we can access a slice, or range, of elements from an array. The range operator uses a starting position and an ending position. The output doesn't include the element at the ending position of the range.

Let's select a range of movies from our catalog.

Learn how to select a slice of elements of a collection.

Getting Started

LINQ Method: Where

Common LINQ Methods

Syntax & Pitfalls

Refactor with LINQ

What's New in LINQ?

Wrap-up!

Take Method with Ranges

What are indices and ranges?