Why records were introduced in C Sharp (C#) - See It in Action

Understanding Why Records Were Introduced in C#

📖 Scenario: Imagine you want to store information about a book in a library system. You want to keep the title and author together and easily compare two books to see if they are the same.

🎯 Goal: You will create a simple data structure to hold book information and learn why C# introduced record types to make this easier and clearer.

📋 What You'll Learn

Create a class to hold book information with properties for title and author

Create a record to hold book information with the same properties

Compare two instances of the class and two instances of the record

Print the results of the comparisons to see the difference

💡 Why This Matters

🌍 Real World

Records are useful when you want to store data like user profiles, settings, or messages where comparing content matters more than comparing object references.

💼 Career

Understanding records helps you write cleaner, safer code in C# applications, especially in domains like web development, APIs, and data processing.

1

Create a class called BookClass with Title and Author properties

Write a class named BookClass with two public string properties: Title and Author. Use auto-properties with get and set.

C Sharp (C#)

// Your code here

Need a hint?

Use public class BookClass and add two properties with get; set;.

2

Create a record called BookRecord with Title and Author properties

Write a record named BookRecord with two public string properties: Title and Author. Use positional parameters in the record declaration.

C Sharp (C#)

public class BookClass
{
    public string Title { get; set; }
    public string Author { get; set; }
}

// Your code here

Need a hint?

Use public record BookRecord(string Title, string Author); to create a record with two properties.

3

Create two instances of BookClass and two instances of BookRecord with the same data

Create two BookClass objects named book1 and book2 with Title = "C# Guide" and Author = "Jane Doe". Also create two BookRecord objects named record1 and record2 with the same values.

C Sharp (C#)

public class BookClass
{
    public string Title { get; set; }
    public string Author { get; set; }
}

public record BookRecord(string Title, string Author);

// Your code here

Need a hint?

Create objects using new and assign the exact values for Title and Author.

4

Compare the two BookClass objects and the two BookRecord objects and print the results

Use Console.WriteLine to print the result of book1 == book2 and record1 == record2. This will show how equality works differently for classes and records.

C Sharp (C#)

public class BookClass
{
    public string Title { get; set; }
    public string Author { get; set; }
}

public record BookRecord(string Title, string Author);

BookClass book1 = new BookClass { Title = "C# Guide", Author = "Jane Doe" };
BookClass book2 = new BookClass { Title = "C# Guide", Author = "Jane Doe" };

BookRecord record1 = new BookRecord("C# Guide", "Jane Doe");
BookRecord record2 = new BookRecord("C# Guide", "Jane Doe");

// Your code here

Need a hint?

Use Console.WriteLine(book1 == book2); and Console.WriteLine(record1 == record2); inside a Main method.