C# - Use Record Types for Immutable Data Structures

In C#, you can use record types to define immutable data structures. Records are a concise syntax to create an immutable object with value equality. Unlike classes, records provide a built-in copy-and-update functionality which can be very useful for functional-style programming patterns.

Here's a quick example of how you might use a record type:

public record Person(string FirstName, string LastName, int Age);

public static void Main(string[] args)
{
    var originalPerson = new Person("Jane", "Doe", 30);

    // Create a new record instance with the Age updated, keeping the rest of the fields the same.
    var updatedPerson = originalPerson with { Age = 31 };

    Console.WriteLine(originalPerson); // Output: Person { FirstName = Jane, LastName = Doe, Age = 30 }
    Console.WriteLine(updatedPerson); // Output: Person { FirstName = Jane, LastName = Doe, Age = 31 }
}

This shows the simplicity of creating and manipulating immutable objects using records, which can help you manage state more predictably in your applications. Use records when you need value-based equality and immutability for more robust and maintainable code.