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 group elements of a collection

The `GroupBy` method groups the elements of a collection based on a grouping key. This method returns a collection of groups, or buckets, organized by that key.

For example, let's group our movies by rating.

# How to group elements of a collection

The `GroupBy` method groups the elements of a collection based on a grouping key. This method returns a collection of groups, or buckets, organized by that key.

For example, let's group our movies by rating.

Learn how to group and order the elements of a collection using GroupBy and OrderBy methods.

Getting Started

LINQ Method: Where

Common LINQ Methods

Syntax & Pitfalls

Refactor with LINQ

What's New in LINQ?

Wrap-up!

GroupBy and OrderBy Methods

How to group elements of a collection