LINQ中带附加值的全对象投影

是否可以投影对象的每个属性并添加更多属性,而无需具体列出所有属性。例如,不要这样做:

   var projection = from e in context.entities
                    select new QuestionnaireVersionExtended
                    {
                        Id = e.Id,
                        Version = e.Version,
                        CreationDate = e.CreationDate,
                         ... 
                         many more properties
                         ...
                        NumberOfItems = (e.Children.Count())
                    };

我们可以这样做吗:

   var projection = from e in context.entities
                    select new QuestionnaireVersionExtended
                    {
                        e,
                        NumberOfItems = (e.Children.Count())
                    };

它将从e中获取具有相同名称的每个属性,并将“NumberOfItems”属性添加到该属性上?