"Additional Record Constructors"

public record User(string Name, int Age) {
	public string Note { get; set; } = $"{Name}, aged {Age}";

	public User(string name, int age, string note) : this(name, age) { // Without the 'this(name, age)', this ctor will not compile
		Note = note;
	}
}

void Test() {
	Console.WriteLine(new User("Ben", 30).Note); // Ben, aged 30
	Console.WriteLine(new User("Ben", 30, "Custom user note").Note); // Custom user note
}


Code snippet taken from "Two Decades of C#: A Reference - C# 9".