c#将列表映射到ILookup<int、tenant>

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
        // 创建一个列表
        List<Tenant> tenants = new List<Tenant>()
        {
            new Tenant() { Id = 1, Name = "Tenant 1" },
            new Tenant() { Id = 2, Name = "Tenant 2" },
            new Tenant() { Id = 1, Name = "Tenant 3" },
            new Tenant() { Id = 2, Name = "Tenant 4" }
        };

        // 将列表映射到ILookup<int, tenant>
        ILookup<int, Tenant> tenantLookup = tenants.ToLookup(t => t.Id);

        // 使用ILookup进行查询
        int key = 1;
        IEnumerable<Tenant> matchingTenants = tenantLookup[key];

        // 输出查询结果
        foreach (Tenant tenant in matchingTenants)
        {
            Console.WriteLine($"Tenant Id: {tenant.Id}, Name: {tenant.Name}");
        }
    }
}

class Tenant
{
    public int Id { get; set; }
    public string Name { get; set; }
}