C# Is there a way to make the properties of an object in a class non-editable outside the class itself?

I am looking for a way to have an object in a class and make it non-editable (the object itself AND its properties) outside the class itself but still visible outside.

internal class Room
{
    public string Description { get; set; }
}

internal class RoomController
{
    public Room Room { get; private set; }
    
    public RoomController()
    {
        Room = new Room();
    }

    //Edit the room inside this class
}

internal class Foo
{
    public void SomeMethod()
    {
        RoomController rc = new RoomController();
        
        rc.Room.Description = "something";   // This should not be allowed 
        string roomDesc = rc.Room.Description;   // This should be fine   
    }
}

Is something like that possible? I couldn’t find anything regarding the issue so I would be grateful if anyone has any ideas.

Thanks in advance!

>Solution :

You could define an interface that only exposes the bits you want public:

internal interface IReadonlyRoom
{
  string Description { get; }  //note only getter exposed
}

internal class Room : IReadonlyRoom
{
    public string Description { get; set; }
}

internal class RoomController
{
    private Room _room;

    public IReadonlyRoom Room => _room;

    public RoomController()
    {
        _room = new Room();
    }

    //edit using _room
}