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();
}