i need help with this windows forms app project (visual studio)

Make a Windows Forms application that contains:

At least 3 classes;

Some forms where you can perform CRUD operations (create, read, update, delete) on the entities defined above;

Implement a data validation mechanism (ErrorProvider controls, exception handling)

Extra points:

Implementation of a menu bar for one of the forms based on the resources you find online and containing at least 2 options: Exit - close the application and About - a MessageBox or similar variants to display your name

Implementation of custom exception

Distribution of the score (max 10 points):

3 - classes and entities

4 - CRUD operations

1 - error providers

1 - custom exception

1 - Implement menu bar