This section is dedicated to exploring the depths of LINQ (Language Integrated Query) in the context of Advanced C#. LINQ provides a powerful way to perform queries and transformations on data, and in this section, we'll delve into the nuances of LINQ usage in C#.

What is LINQ?

LINQ stands for Language Integrated Query and is a Microsoft .NET Framework technology that provides the ability to perform queries over collections, databases, XML, and more, directly within the C# language.

Key Concepts

  • LINQ to Objects: Queries against in-memory collections such as arrays, lists, and dictionaries.
  • LINQ to SQL: Queries against SQL Server databases.
  • LINQ to XML: Queries against XML data.
  • LINQ to Entities: Queries against Entity Framework data models.

LINQ in Action

To demonstrate the power of LINQ, let's consider a simple example of querying a list of books:

var books = new List<Book>
{
    new Book { Title = "Pro C#", Author = "Christian Nagel" },
    new Book { Title = "Effective C#", Author = "Benjamin C. Smith" },
    new Book { Title = "C# 8.0 in Depth", Author = "Jon Skeet" }
};

var filteredBooks = books.Where(book => book.Author.StartsWith("C"));

foreach (var book in filteredBooks)
{
    Console.WriteLine(book.Title);
}

In the above code, we're using LINQ to filter the list of books based on the author's name.

More Resources

For those looking to expand their knowledge, we recommend checking out the following resources:

LINQ Diagram

Enjoy your journey into the world of Advanced C# LINQ!