使用位掩码逻辑的Linq连接

[Flags]
public enum Permissions
{
    None = 0,
    Read = 1,
    Write = 2,
    Delete = 4
}

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

public class User
{
    public string Name { get; set; }
    public Permissions Permissions { get; set; }
}

public class Program
{
    public static void Main()
    {
        List<User> users = new List<User>
        {
            new User { Name = "Alice", Permissions = Permissions.Read | Permissions.Write },
            new User { Name = "Bob", Permissions = Permissions.Read },
            new User { Name = "Charlie", Permissions = Permissions.Delete }
        };

        Permissions requiredPermissions = Permissions.Read | Permissions.Write;

        var usersWithRequiredPermissions = users
            .Where(user => (user.Permissions & requiredPermissions) == requiredPermissions)
            .ToList();

        foreach (var user in usersWithRequiredPermissions)
        {
            Console.WriteLine(user.Name);
        }
    }
}