three tiers layer with Generic repository design pattern:

Crud operator:

1. We create an abstraction layer between data .
  access layer (DbContext) and presentation layer (Controllers).
2. Reduces Code Duplicate .
3. Code is cleaner and easier to maintain and reuse.
4- Support Loosly Coupled Approach
5- Support Dependency Injection

6- Client side validation

7- Support Unit Testing

8- using Search about Employee By name