Model View Presenter (MVP) Example - #4 Creating A Service Layer

Part 4 of MVP Using WinForms. This video covers creating a services layer for use by the Presenter. The Presenter will use services in the Service Layer to carry out tasks such as send and receive model data from the repository. The Service Layer will also transform model data when needed for data being sent to the Presenter for use by the View.

Note that video #8 is where coverage of the Presenters and Views begin if that is what you are looking for. The overview is in Video #1.
Briefly discussed topics in this Video:

1) Using Visual Studio 2017 to create a new Service Layer
2) Create a Class Library project with .NET Framework support to be used as the Service Layer
3) Creation of folder structure
4) Create interfaces for Department models, repository, and a common services area in the Service Layer.
5) Create a validation service which uses data annotations defined in model classes.

A detailed overview is provided in Video #1
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CODE CORRECTIONS SINCE VIDEO RELEASE:

Please note the correct declaration for the DepartmentServices class should be as follows:

public class DepartmentServices : IDepartmentServices

The video shows it also has an interface file reference to IDepartmentRepository but that is incorrect. I only had it on there originally to accommodate the auto method name generations but it was supposed to of been removed after that.
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Видео Model View Presenter (MVP) Example - #4 Creating A Service Layer канала Robert G Marquez