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Entity Framework 4.1: Expert's Cookbook by Tim Rayburn, Devlin Liles

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Implementing composed queries

Composed queries are an effective way to link separate but related pieces of filtering logic into reusable pieces. In this recipe, we will compose queries together to accomplish a certain filter without needing to write the code twice but still having it translated into a single SQL execution.

Getting ready

We will be using the NuGet Package Manager to install the Entity Framework 4.1 assemblies.

The package installer can be found at http://nuget.org.

We will also be using a database for connecting to and updating data.

Open the Improving Transaction Scope solution in the included source code examples.

How to do it...

Carry out the following steps in order to accomplish this recipe.

  1. We will start by adding a new unit test ...

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