SqlCommand sqlcmd = new SqlCommand("delete from stagiaire where Id_stagiaire = @Id_stagiaire", sqlcon);
            SqlDataReader sqldr;
            sqlpr1 = new SqlParameter();
            sqlpr1.ParameterName = "@Id_stagiaire";
            sqlpr1.DbType = System.Data.DbType.Int16;
            sqlpr1.Direction = System.Data.ParameterDirection.Input;
            sqlpr1.Value = this.txtID.Text;
            sqlcmd.Parameters.Add(sqlpr1);
            if (this.txtID.Text == "") MessageBox.Show("Le Champ de Identifiant est vide!");
            else
            
            sqlcon.Open();
            sqlcmd.ExecuteNonQuery();
            MessageBox.Show("Supprimer Avec Succès !");
            sqlcon.Close();