在将大型列作为实体的一部分时，是否存在LINQ或实体框架的任何开销？

Let's say you have a table containing articles and you want want to display a list of them, excluding the actual article text. When you get a list of the article objects using LINQ or the Entity Framework, is there a LOT of overhead associated with getting that text column too? I assume that when you start enumerating the list, the article text will be stored in memory until the objects are disposed of.Let's say you have a table containing articles