private void EditEmployee()
        {
            selectedEmployee = dataGridViewEmployees.SelectedRows[0].Tag as Employee;
            FormAddorEditEmployee newEmployee = new FormAddorEditEmployee(employees, selectedEmployee);

            newEmployee.ShowDialog();
            selectedEmployee = null;
        }
        private void AddNewEmployee()
        {
            FormAddorEditEmployee newEmployee = new FormAddorEditEmployee(employees, selectedEmployee);

            newEmployee.ShowDialog();
        }