Linq lambda merge error

I follow the Pro ASP.net MVC 2 Framework book, which I found quite brilliant. But this is a real learning curve, and now I'm stuck.

In the book, you create something like below, which allows swapping.

public ViewResult List([DefaultValue(0)] string cityzip, [DefaultValue(1)] int page)
{

var roomsToShow = roomsRepository.Rooms.Where(x => x.CountryID == cityzip);

var viewModel = new RoomsListViewModel
{

    Rooms = roomsToShow.Skip((page - 1) * PageSize).Take(PageSize).ToList(),
    PagingInfo = new PagingInfo
    {
        CurrentPage = page,
        ItemsPerPage = PageSize,
        TotalItems = roomsToShow.Count()
    }
};
return View(viewModel); // Passed to view as ViewData.Model (or simply Model) 

} 

It seems to me that it was necessary to adapt this so that I can make a connection in the search

public ViewResult List([DefaultValue(0)] string cityzip, [DefaultValue(1)] int page)
{

var roomsToShow = roomsRepository.Rooms.Join(
                    roomCoordinatesRepository.RoomCoordinates,
                    room => room.RoomID,
                    roomCoordinate => roomCoordinate.RoomID,
                    (room, roomCoordinate) => new { RoomCoordinate = roomCoordinate, Room = room });

var viewModel = new RoomsListViewModel
{

    Rooms = roomsToShow.Skip((page - 1) * PageSize).Take(PageSize).ToList(),
    PagingInfo = new PagingInfo
    {
        CurrentPage = page,
        ItemsPerPage = PageSize,
        TotalItems = roomsToShow.Count()
    }
};
return View(viewModel); // Passed to view as ViewData.Model (or simply Model) 

} 

... but immediately I get an intellisense error message: Unable to implicitly convert type 'System.Collections.Generic.List<AnonymousType#1>'to 'System.Collections.Generic.IList<MeetingRoom.Domain.Entities.Room>'. Explicit conversion exists (are you skipping listing?)

I obviously don’t understand the code enough to understand what’s wrong. I also feel a little deep inside with this lamda linq material

A room is a domain object that is defined as:

   namespace MeetingRoom.Domain.Entities
    {
         [Table(Name = "Rooms")]
         public class Room
         {
            [Column(IsPrimaryKey = true, IsDbGenerated = true, AutoSync = AutoSync.OnInsert)] 
            public int RoomID { get; set; }
            [Column] public string Name { get; set; }
            [Column] public string Description { get; set; }
            [Column] public decimal Price { get; set; }
            [Column] public string Category { get; set; }
            [Column] public string Pcode { get; set; }
            [Column] public int CountryID { get; set; }


            public MeetingRooms.Domain.entities.RoomCoordinate RoomCoordinate { get; set; }
      }
    }

My Room. - , Room Room-?

- :

namespace MeetingRooms.Domain.entities
{
    [Table(Name = "RoomCoordinate")]
    public class RoomCoordinate
    {
        [Column(IsPrimaryKey = true, IsDbGenerated = true, AutoSync = AutoSync.OnInsert, Name = "ID")]
        public int CoordID { get; set; }
        [Column]
        public int RoomID { get; set; }
        [Column]
        public string Coordinates { get; set; }
        [Column]
        public decimal Latitude { get; set; }  
        [Column]
        public decimal Longitude { get; set; }  
    }
}

The RoomsListViewModel : MeetingRoomsMVC.WebUI.Models {    RoomsListViewModel   {       public IList RoomsWithCoordinates {get; ; }       public PagingInfo PagingInfo {get; ; }
  } }