如何在我的方法输入参数上放置验证约束？

public class Person {
    @NotNull
    private String name;

    @Min(18)
    private int age;
}

from typing import Annotated

def person(name: Annotated[str, "must not be empty"], age: Annotated[int, "must be greater than or equal to 18"]):
    pass

type Person = {
    name: string;
    age: number;
};

function validatePerson(person: Person): person is Person {
    return person.name !== "" && person.age >= 18;
}

using System.Diagnostics.Contracts;

public class Person {
    public string Name { get; }
    public int Age { get; }

    public Person(string name, int age) {
        Contract.Requires<ArgumentException>(!string.IsNullOrEmpty(name), "Name must not be empty");
        Contract.Requires<ArgumentException>(age >= 18, "Age must be greater than or equal to 18");

        Name = name;
        Age = age;
    }
}