Why does the entity framework need an ICollection for lazy loading?

Question

I want to write a rich domain class such as

public class Product    
{    
   public IEnumerable Photos {get; private set;}    
   public void A         


        

Answer 1

You can overcome this by using the ReadOnlyCollection(Of T)

public class Product    
{  
    private IList _photos;  
    public IList Photos {
        get
        {
            return _photos.AsReadOnly();
        }
        private set { _photos = value; }
    }
    public void AddPhoto(){...}    
    public void RemovePhoto(){...}    
}

EDIT: ICollection => IList

Hope that is what you were looking for.