Introduction to Entity Framework

A long time ago, I wanted to learn EF well. I have been trying to learn EF for a variety of reasons, and I have never started well. Now I have made up my mind. In any case, I must take this step first, in addition, we will record the EF-related knowledge we have learned for future use. We hope that many bloggers will study and discuss it together.

Entity Framework (EF) is an open-source "Object/Relational ing (ORM: Object Relational Mapping)" Framework, this allows applications to use a "pure" Object Model to access data in relational databases.

EF is a data access technology promoted by Microsoft. In other important Microsoft technical fields, such as Asp. Net MVC and WCF, EF is used to build a data access layer.

In actual development, EF is usually used to build the data access layer of an application.

Open source with sufficient resource investment and continuous improvement.

You can access multiple databases (such as Oracle, ibm db, SQL AnyWhere, MySql, and SQLite), but it works best with SQL Server.

It is better to isolate applications from databases.

Flexible enough to support three development modes.