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In code, you might want to work with objects in an object oriented fashion. Pranaya Rout is a Senior Technical Architect with more than 11 Years of Experience, Microsoft MVP, Author, YouTuber, and Blogger eager to learn new technologies. Pranaya Rout has published more than 3,000 articles in his 11-year career. ORMs Tools are used to increase the developer’s productivity by reducing the redundant task of doing CRUD operations against a database in a .NET Application. The Entity Framework Create Employee and Department classes automatically based on the Employees and Departments Tables.

Let us proceed and see how we can rewrite the same example using Entity Framework using C# language. As per the above figure, Entity Framework fits between the business entities (Domain Classes) and the database. It saves the data in the business properties entities and also retrieves the data from the database and converts it into the business entity’s object automatically. EF API will create a ForeignKey column in the table for the navigation properties that points to a PrimaryKey of another table in the database. For example, Grade are reference navigation properties in the following Student entity class.

The Entity Data Model

Furthermore, it depicts that the Entity Framework minimizes the codes of data accessing that the developers usually write. As per the above figure, Entity Framework fits between the business entities (domain classes) and the database. Now your object directly works with the database to retrieve or make changes. The above diagram shows that the Entity Framework fits between the Data Layer and the database.

what is entity framework in c#

Or even worse, if we use pessimistic concurrency, we could seriously degrade performance. In the previous section, we integrated Entity Framework Core to suit our current architecture the most. However, the DbContext class already implements the unit of work pattern. Moreover, it does it without opening a transaction prematurely, by using an in-memory change tracker.

EF 6 DB-First

Moreover, the usage of transactions is an implementation detail of the unit of work, so let’s not expose that to the caller. In this article, we will discover the unit of work pattern, its advantages and disadvantages, what is entity framework and an example implementation that is completely ORM agnostic. Moreover, we will look at the unit of work’s connection with the repository pattern and we will see how easy it is to change the underlying ORM.

what is entity framework in c#

Most ORMs typically map the type of the domain directly to the schema of the database. The above classes become entities when they are included as DbSet properties in a context class (the class which derives from DbContext), as shown below. But that second call will only happens when you will try to reach the invoices. Entity Framework Core uses a provider model to access many different databases. EF Core includes providers as NuGet packages which you need to install.

Tools and extensions – Entity Framework EF6

In C# term entity is commonly related to database representation of the table and should contain an Id attribute. A class, on the other hand, defines or contains the definition of an object. Once that object is constructed based on the definition, then you get your instance or object instance. ADO.Net seems to refer directly to the technology for data sets and data tables.

However, in the event of a power outage, the money will never be credited to the recipient’s account, nor will it be returned to the sender. This outcome is unacceptable, so these two operations must execute within the same transaction, forming a single unit of work. If you wanted to use this database within your web application, you would need to create three entities which look like this. So to acces a given something (an entity), you need to reference the scope to refer to it. In object-oriented programming an entity corresponds to an object instance. In data modelling it corresponds to a unit of data rather than something necessarily having a physical presence.