private void btnSave_Click(object sender, RoutedEventArgs e)
 {
     if (data.ProductName == null)
     {
         MessageBox.Show(string.Format(Message.PL.Empty_Record, "Product"));
     }
     else if (data.Id == 0 && !BLL.UserAccount.AllowInsert(FormName))
     {
         MessageBox.Show(string.Format(Message.PL.DenyInsert, FormName));
     }
     else if (data.Id != 0 && !BLL.UserAccount.AllowUpdate(FormName))
     {
         MessageBox.Show(string.Format(Message.PL.DenyUpdate, FormName));
     }
     else
     {
         if (data.Save() == true)
         {
             MessageBox.Show(Message.PL.Saved_Alert);
             data.Clear();
         }
         else
         {
             MessageBox.Show(string.Format(Message.PL.Existing_Data, data.ProductName));
         }
     }
 }