c# 9 syntax code example

Example 1: record c#

public record Person(string FirstName, string LastName);

public record Teacher(string FirstName, string LastName,
    string Subject)
    : Person(FirstName, LastName);

public sealed record Student(string FirstName,
    string LastName, int Level)
    : Person(FirstName, LastName);

Example 2: c# record

public record Teacher : Person
{
    public string Subject { get; }

    public Teacher(string first, string last, string sub)
        : base(first, last) => Subject = sub;
}