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#

# Write an `Exactly` method

Again, it’s your turn!

Let's write an `Exactly` method to check if a collection has exactly a given number of elements.

To complete this exercise, follow the instructions in the comments and fill in the `Exactly` method on the `EnumerableExtensions.cs` file.

Getting Started

LINQ Method: Where

Common LINQ Methods

Syntax & Pitfalls

Refactor with LINQ

What's New in LINQ?

Wrap-up!

Exercise: Implement the Exactly Method

Write an `Exactly` method

Exercise: Implement the Exactly Method

Write an Exactly method

Write an `Exactly` method