using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}

​

public class UserRepository

{

    private readonly List<User> _users = new();

    public void Add(User user)

    {

        user.Id = _users.Count + 1;

        _users.Add(user);

    }

    public void Save()

    {

        foreach(var user in _users)

        {

            Console.WriteLine(user);

        }

    }

}

​

public class OrganizationRepository

{

    private readonly List<Organization> _organizations = new();

    public void Add(Organization organization)

    {

        organization.Id = _organizations.Count + 1;

        _organizations.Add(organization);

    }

    public void Save()

    {

        foreach(var organization in _organizations)

        {

            Console.WriteLine(organization);

        }

    }

}

​

public class User

{

    public int Id { get; set; }

    public string FirstName { get; set; }

    public override string ToString() => $"Id: {Id}, FirstName: {FirstName}";

}

public class Organization

{

    public int Id { get; set; }

    public string Name { get; set; }

    public override string ToString() => $"Id: {Id}, Org Name: {Name}";

}