C# 数据库中的ASP.NETMVC模型

我从DB创建了我的模型，其中有表Users、Roles和UsersInRoles，这是前两个表之间的中间表。 我的问题是，既然没有将表UsersInRoles添加到模型中，我如何将Roles=something的特定用户作为对象

public partial class Role
    {
        public Role()
        {
            this.Users = new HashSet<User>();
        }

        public int RoleID { get; set; }
        public string RoleName { get; set; }
        public string RoleDescription { get; set; }

        public virtual ICollection<User> Users { get; set; }
    }

public partial class User
    {
        public User()
        {
            this.Roles = new HashSet<Role>();
        }

        public int UserID { get; set; }
        public string Username { get; set; }
        public string Password { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }

        public virtual ICollection<Role> Roles { get; set; }
    }

public ActionResult Index()
        {
            var users = db.Users;
            return View(users.ToList());
        }

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诚然，我对hashset没有太多的经验，但是有没有理由一个简单的Linq查询不起作用呢

var requestedUsers = from UsersInRoles 
                     in db.Users 
                     where UsersInRoles.Roles.Contains(DesiredRoleHere) 
                     select UsersInRoles;

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我相信这会奏效的

        var usersInRole = db.Users.Where(x => x.Roles.Any(y => y.RoleId == roleid));