class MyClass {
// Age is a read-only property; the code to the right of the '=>' is evaluated every time the property is invoked and the result of the expression is returned
public int Age => (int) (DateTime.Now - new DateTime(1990, 01, 19)).TotalYears;
// PrintAge is a method, the code to the right of the '=>' is executed when the function is invoked
public void PrintAge() => Console.WriteLine(Age);
}