Files
2026-07-13 12:42:18 +08:00

49 lines
937 B
C#

using System;
using System.Collections.Generic;
namespace SampleApp
{
public interface IRepository
{
User FindById(int id);
void Save(User user);
}
public class User
{
public int Id { get; set; }
public string Name { get; set; }
}
public class InMemoryRepo : IRepository
{
private Dictionary<int, User> _users = new();
public User FindById(int id)
{
return _users.ContainsKey(id) ? _users[id] : null;
}
public void Save(User user)
{
_users[user.Id] = user;
Console.WriteLine($"Saved user {user.Id}");
}
}
public class UserService
{
private IRepository _repo;
public UserService(IRepository repo)
{
_repo = repo;
}
public User GetUser(int id)
{
return _repo.FindById(id);
}
}
}