protected void GrdCtegories_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            if (e.CommandName == "Delete")
            {
                int ID = int.Parse(e.CommandArgument.ToString());
                BLL.ReferenceCategories obj = new BLL.ReferenceCategories();
                obj.LoadByPrimaryKey(ID);
                obj.MarkAsDeleted();
                obj.Save();

                LoadAllCategories();
            }
            else if (e.CommandName == "Edit")
            {
                Response.Redirect("ReferenceCategories.aspx?CatID=" + e.CommandArgument.ToString() );
            }
        }