private void Button_Click_2(object sender, RoutedEventArgs e)
{
string articleREF = reference.Text;
string articleNAME = name.Text;
string articlePRICE = price.Text;
string articleQUANTITY = stock.Text;
article newArticle = new article(Int32.Parse(articleREF), articleNAME, Convert.ToDouble(articlePRICE), Int32.Parse(articleQUANTITY));
ManageStock.ModifyArticle(stock_article, Int32.Parse(articleREF), newArticle);
DB.ModifyArticle(newArticle, con);
Refresh();
}