private void AddToEntitySet(Object dataContext, OeOperationMessage operation)
        {
            Db.OeEntitySetAdapter entitySetAdapter = _dataAdapter.GetEntitySetAdapter(operation.EntityItem.EntitySet.Name);
            switch (operation.Method)
            {
            case ODataConstants.MethodDelete:
                entitySetAdapter.RemoveEntity(dataContext, operation.EntityItem.Entity);
                break;

            case ODataConstants.MethodPatch:
                entitySetAdapter.AttachEntity(dataContext, operation.EntityItem.Entity);
                break;

            case ODataConstants.MethodPost:
                entitySetAdapter.AddEntity(dataContext, operation.EntityItem.Entity);
                break;

            default:
                throw new NotImplementedException(operation.Method);
            }
        }