The compiler-generated **`ToString()`** method in C# record types displays the public fields and properties with their names and values.

For example, for a record `Person` that contains `FirstName` and `LastName` as public properties, the `ToString` method will display the properties in the following format.

```C#
Person { FirstName = Tom, LastName = Sawyer }

The compiler creates a virtual `PrintMembers` method and overrides the `ToString` method with the help of a #key# StringBuilder:https://learn.microsoft.com/en-us/dotnet/api/system.text.stringbuilder?view=net-5.0 #key# object to implement the built-in formatting functionality.

# Example
The following example demonstrates how the built-in formatting display is used in C# records.

The program creates a record type `Student` and initializes its properties. It then uses the `ToString()` method to display the object's properties with names and values. Simply writing the object's name as the parameter to the `WriteLine` function yields identical results.

using System;
					
public class Program
{
	
	public record Student(string FirstName, string LastName)
	{
    public int Marks { get; init; }
	}
	public static void Main()
	{
		// create an object
		Student student1 = new("Sam", "Johnson") { Marks = 100 };
		// display object
		Console.WriteLine(student1.ToString());
		Console.WriteLine(student1);
		
		
	}
}



## Output
```terminal
Student { FirstName = Sam, LastName = Johnson, Marks = 100 }
Student { FirstName = Sam, LastName = Johnson, Marks = 100 }
```

What is built-in formatting for display in C# 9.0?

ToString in C# 9.0 records formats objects by displaying public fields and values like "Person { FirstName = Tom, LastName = Sawyer }".