public static void Add(Employee employee)
 {
     var context = new SoftUniEntities();
     context.Employees.Add(employee);
     context.SaveChanges();
     Console.WriteLine("Employee has been added.");
 }
        static void Main()
        {
            Employee employee = new Employee();
            employee.FirstName = "Dimitar";
            employee.LastName = "Penchev";
            employee.JobTitle = "Tool Designer";
            employee.DepartmentID = 2;
            employee.HireDate = DateTime.Now;
            employee.Salary = 20000;

            //1.Insert an employee
            DataAccessObject.Add(employee);

            //2.Prints his/her primary key generated by the DB
            int employeeId = employee.EmployeeID;
            Console.WriteLine(employeeId);

            //3.Changes the employee first name and saves it to the database
            DataAccessObject.Modify(employeeId, "FirstName", "Marin");

            //4.Deletes an employee
            DataAccessObject.Delete(employeeId);
        }