The Code First approach allows you to use Entity Framework and define the entity model sans the designer or XML files. You can use the POCO (Plain Old CLR Objects) approach to define the model and ...

This article will explain what the Code First development approach is all about and how to use it in order to implement your data-access layer. The article is based on the Entity Framework Feature ...

You can rapidly develop your database design in SQL Management Studio then generate the code model in just few clicks. More recently I’ve come to prefer #1 (or #2) for the following reasons.

Take advantage of the Code First approach in Entity Framework Core to create the data model for your application based on its domain entities in ASP.NET Core.

If you’re using a code first approach to developing with Entity Framework, it’s even more likely you’ll make a mistake with decimal precision.

However I agree with jxl. I have used EF Code First on a couple of different projects, and it's fantastic right up until the point you want to do something that isn't implemented well (or at all).

Code First is a new development approach in the Entity Framework 4.1 stack that can simplify the understanding and maintenance of your domain model.