Here we are going to achieve how to add Entity Framework (EF) Core from database in mvc core using package manager console visual studio 2017. Before starting let’s know what is Entity Framework (EF) Core. Entity Framework (EF) Core is a lightweight, extensible, and cross-platform version of the popular Entity Framework data access technology. EF Core is an object-relational mapper (O/RM) that enables .NET developers to work with a database using .NET objects.

Here we are going to achieve how to update Entity Framework (EF) Core from database in mvc core using package manager console visual studio 2017. Before starting let’s know what is Entity Framework (EF) Core. Entity Framework (EF) Core is a lightweight, extensible, and cross-platform version of the popular Entity Framework data access technology. EF Core is an object-relational mapper (O/RM) that enables .NET developers to work with a database using .NET objects.

Entity Framework lazy loading is one of the important concepts. Lazy loading means delaying the loading of related data, until you specifically request for it or lazy loading, related objects (child objects) are not loaded automatically with its parent object until they are requested

A DbSet represents the collection of all entities in the context. Is used for Add, update, delete and read operations. You can also use generic type of DBSet (DbSet<TEntity>) when the entity type is unknown at build time. DbSet objects are created from a DbContext using the DbContext.Set method.

The Entity Framework Database First Approach give an alternative option instead of Code First and Model First approaches to the Entity Data Model .it generate model codes (classes, properties, DbContext etc.) from the selected database. So, Entity Framework database First approach, add new ADO.NET Entity Data Model and Select Generate from database EF Designer model in Entity Data Model Wizard.

Entity Framework Model First approach, enable to you create your model in Entity Framework designer and then generate SQL, which will create database schema to match your model and then you execute the SQL to create the schema in your database. The classes that you communicate with in your application are automatically generated from the EDMX file.

Entity Framework provides Code-First approach from Entity Framework 4.0. Code-First is mainly useful for First design model for business domain requirement instead of database Design. In the Code-First approach, you can focus on the business domain design and start creating classes as per your business domain requirement rather than design your database first and then create the classes which match your database design. Entity framework code first automatically create database when run your application.

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