public void FillCategoryCombo()
 {
     try
     {
         BusinessManager BM = new BusinessManager();
         cboxProductCategory.AutoCompleteSource = AutoCompleteSource.ListItems;
         //cboxProductCategory.DropDownStyle = ComboBoxStyle.DropDownList;
         cboxProductCategory.DisplayMember = "CategoryName";
         //cboxProductCategory.ValueMember = "CategoryName";
         cboxProductCategory.DataSource = BM.BALFillCategoryCombo().Tables[0];
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
 }