The course provides a detailed view of an ORM framework, namely - Entity Framework(EF) - the ORM standart in C# and .NET apps. EF allows mapping between a relational databases and an object-oriented model implementing the "code-first" and the "databse-first" approaches. Database queries and CRUD operations are done by the means of a powerful object-oriented API. The templates "Repository" and "Unit of Work" will be used for building the database layer of complex applications.