The ADO.NET Entity Data Model allows the application to have its own view of the application's data.
Here again is the design view of the Payroll EDM we created in Chapter 2:
Note that the relationships and the respective fields are displayed along with their multiplicity. You can also see the Scalar and NavigationProperties. While the Scalar Properties section lists the attributes or the fields of the Entity, the NavigationProperties are those that denote the associations of a particular Entity with other entities. As an example, the Employee entity uses the Department and the Salary entities to relate its foreign keys DepartmentID and SalaryID respectively. Therefore, you can see that the Department and Salary entities are listed in the NavigationProperties section of the Employee entity.