private void add_btn_Click(object sender, EventArgs e)
 {
     using var employeeManage = new employee_manage();
     employeeManage.Owner     = this;
     employeeManage.ShowDialog();
     this.BringToFront();
 }
 void EditEvent(object sender, EventArgs e)
 {
     using var employeeManage = new employee_manage();
     employeeManage.emp_id    = btn_dgv.DGV.SelectedRows[0].Cells["emp_id"]?.Value.ToString();
     employeeManage.Owner     = this;
     employeeManage.ShowDialog();
     this.BringToFront();
 }