我几乎没有接触过EF4，但我已经用了很多Linq来sql了。我想从EF模板中的一个开始，但我不知道什么情况对每个模板都有意义，也不知道它们的意图是什么。
我有以下可能性：
I have no idea what situations make sense for each or what their intent was
这并不是说听起来很粗鲁，但你有没有在MSDN/ASP.NET上找到答案？周围有很多信息。每个模板都有很多，我在这里无法深入了解。每一个都有一个MSDN页面。
话虽如此，我会给你一个快速摘要，所以在这里跌跌撞撞的人会有一些信息。
ADO.NET实体数据模型
这是您为使用实体框架作为ORM而创建的文件，它是使用EF所必需的。在使用其他任何一个之前，您都需要这个。您可以使用多种不同的方法创建EDM，包括数据库优先（从DB生成）、代码优先、模型优先等。
基于服务的数据库
我从未听说过这个词，鉴于我最近一直在与英孚合作（并阅读），我怀疑这是否与英孚有关。
ADO.NET实体对象生成器
为从EntityObject类继承的实体生成类。与默认的EF代码生成器相同，不同之处在于没有将输出代码放入Model.edmx.designer.cs（默认）文件中，而是将代码放入单独的文件中。我个人认为这个模板没有任何好处。
ADO.NET自跟踪实体生成器
当您想要开发N层应用程序时（即，如果您想要允许WCF/Silverlight应用程序与您的模型一起工作），为实体生成类。实体被设置为可由EF图跟踪，以便处理来自各种应用程序的持久性操作。
ADO.NET C#POCO实体生成器
我的最爱。：）为从nothing继承的实体生成类。他们不知道自己被用来坚持。当您希望域/持久性层的持久性无知、可测试性和松散耦合时，请将其用于应用程序。
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