Entity Framework – Code first is a flexible pattern for the existing database first and Model first patterns. In code first, the models are created using classes (C#/VB.NET) first which can be mapped to an existing database or create a new database schema. Foreign key associations and property/column settings can be added through Data Annotations or using fluent API.
To have the code first feature in your visual studio, you will have to install ADO.NET Entity Framework 4.1
