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All LessonsFree Lessons (2)

Getting Started

Introduction What Is LINQ?LINQ and Declarative Programming

LINQ Method: Where

LINQ and IEnumerable Type What Are Extension Methods?Quiz on Extension Methods What Are Lambda Expressions?Quiz on Lambda Expressions How to Use the Where Method Exercise: Find Your Favorite Movies Exercise: Rewrite Our First Example Using Lambda Expressions LINQ and Immutability LINQ and Laziness

Common LINQ Methods

The Select Method

Any and All Methods

Quiz on LINQ Methods

Exercise: Implement Your Own Any Method

GroupBy and OrderBy Methods

First and FirstOrDefault Methods

Take and Skip Methods

Exercise: Write a Pagination Method

Exercise: Refactor From Loops to LINQ

Sum, Min, and Max Methods

SelectMany Method

Aggregate Method

The Distinct Method

Intersect, Union, and Except Methods

Exercise: Implement the Exactly Method

Exercise: Use LINQ Methods

Exercise: Sort by Occurrences

Syntax & Pitfalls

Query-like Syntax Common Mistakes and What to Do Exercise: Remove Mistakes

Refactor with LINQ

Replace Comparisons with Any Replace a Set of Choices with FirstOrDefault Validate Objects with All Exercise: Add a Recommended Movie

What's New in LINQ?

LINQ and .NET 6 Chunk Method DistinctBy Method Take Method with Ranges XOrDefault Methods with Defaults Quiz on New LINQ Methods

Wrap-up!

Getting Started with LINQ in C#/

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Any and All Methods

Any and All Methods

Learn how to filter a collection with the Any and All methods.

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Let’s learn how to use the Any and All methods to check whether a collection has elements or not. Unlike Select and Where, these two methods don’t return a new collection, but a boolean result.

How to check if a collection has elements

The Any method works with and without parameters.

The Any method, ...