Implementation Strategies for the Repository Pattern with Entity Framework, Dapper, and Chain

Jonathan Allen. InfoQueue. 2016-10-14.

In modern enterprise development it is common to use a multi-layered approach to building one’s data access layer (DAL). When using C#, the lowest layer of the DAL is almost always ADO.NET. However, that can be a clumsy library at times so it is common to layer upon it an ORM. Then to enable mocking and hide the ORM’s details, the whole DAL is wrapped inside a repository.
In this series we’ll be looking at techniques for building a repository using three different styles of ORM:
•Entity Framework: A tradition “full feature” or “OOP” style ORM
•Dapper: A lightweight micro-ORM that focuses primarily on result set mapping.
•Tortuga Chain: A fluent ORM based on functional programming concepts.
This article will focus on the basic functionality that one would find in a typical repository. In part two, we’ll look at advanced techniques that one would implement on a case by case basis.
[Implementation Strategies for the Repository Pattern with Entity Framework, Dapper, and Chain]

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