/// <summary>
/// Registers a modelobject for change logging. This method is supposed to be called by the ModelObject's themselves, not by user
/// </summary>
/// <param name="obj"></param>
public virtual void AddObject(IModelObject obj)
{
if (Objects.Contains(obj))
{
throw new InvalidOperationException("Object already added");
}
Objects.Add(obj);
obj.Initialize(this);
//flagChanged(obj, ModelChange.Added);
}
