Entity Framework Specification Pattern Implementation

Question

How-to implement Specification Pattern with Entity Framework ?

Answer 1

Basically, there should be nothing special (due to EF) when implementing the specification pattern. You implement the specifications as separate classes, which work with your domain model.

You can find lots of articles or webcasts about the specification pattern, and even some which use EF, e.g. here and here.

Answer 2

Just use NSpecifications lib (that I wrote myself). It's free. You can use it with any ORM based on IQueryable interface such as Entity Framework or Linq2Sql: https://github.com/jnicolau/NSpecifications

Or get it from Nuget:

Install-Package NSpecifications -Version 1.1.0