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using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace Fixtures
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{
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public class Person
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{
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public int Id { get; set; }
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public string Name { get; set; }
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public string Email { get; set; }
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public Person(int id, string name, string email)
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{
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Id = id;
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Name = name;
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Email = email;
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}
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public override string ToString()
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{
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return $"{Name} <{Email}>";
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}
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}
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public class Repository<T>
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{
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private readonly Dictionary<int, T> _items = new();
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public void Add(int key, T item)
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{
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_items[key] = item;
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}
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public T? Find(int key)
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{
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return _items.TryGetValue(key, out var item) ? item : default;
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}
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public IEnumerable<T> GetAll()
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{
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return _items.Values.ToList();
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}
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}
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public static class Helpers
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{
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public static int Add(int a, int b) => a + b;
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public static IEnumerable<T> Filter<T>(IEnumerable<T> items, Func<T, bool> predicate)
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{
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return items.Where(predicate);
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}
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}
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public class Program
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{
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public static void Main(string[] args)
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{
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var repo = new Repository<Person>();
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repo.Add(1, new Person(1, "Alice", "alice@example.com"));
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repo.Add(2, new Person(2, "Bob", "bob@example.com"));
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var active = repo.GetAll();
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foreach (var p in active)
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{
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Console.WriteLine(p);
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}
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Console.WriteLine($"3 + 4 = {Helpers.Add(3, 4)}");
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}
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}
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}
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