How can I use records in C# for immutability?

How can I use records in C# for immutability?

In C#, records are a special type of reference type that provide built-in support for immutability. You can define a record using the record keyword, and by default, its properties are immutable.

Can you show me an example of a record?

Sure! Here's a simple example:

public record Person(string FirstName, string LastName);

This creates a Person record with immutable properties for FirstName and LastName.

What if I want to change a property value?

You can create a new instance of the record with updated values using the with expression. For example:

var person = new Person("John", "Doe");
var updatedPerson = person with { LastName = "Smith" };

Are there any performance considerations with using records?

Records are optimized for value-based equality and can be more efficient in certain scenarios, but they do have some overhead compared to traditional classes. It's best to evaluate based on your specific use case.