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#

# Find bad movies based on their reviews

Now, it's your turn to remove some mistakes from our catalog of movies. The code below has a number of mistakes.

For this exercise, the `Movie` class contains a genre, a director's name, and some reviews. The new `Review` class has a score and a comment.

This time, we have a list of bad movies. Let’s check their ratings and reviews to see if they're that bad.

**Authors Note**: By the way, I grabbed these "bad movies" from the IMDb website. I’m sure some of them are very enjoyable---labeling them "bad" is simply for the purposes of our example below. 

Also, before I forget, the code for the exercise throws a `System.NullReferenceException`. That's one of the mistakes to fix.

Getting Started

LINQ Method: Where

Common LINQ Methods

Syntax & Pitfalls

Refactor with LINQ

What's New in LINQ?

Wrap-up!

Exercise: Remove Mistakes

Find bad movies based on their reviews