private void btn_Add_Personel_Click(object sender, EventArgs e)
{
PersonelDal personelDal = new PersonelDal();
personelDal.AddPersonel(new Personel
{
Personel_BirthDay = dTime_Birthday.Value,
Personel_Name = txb_PersonelName.Text,
Personel_Nationality_Id = int.Parse(txb_PersonelIdentity.Text),
Personel_Surname = txb_PersonelSurname.Text,
Personel_Title = txb_PersonelTitle.Text
});
LoadGridView_Personel();
}