internal static void SetConditionalFormatting(IXLCell cell)
        {
            cell.CellLeft(1);
            var formula = $"={cell.Address}<>{cell.CellLeft(1).Address}";

            cell.AddConditionalFormat().WhenIsTrue(formula)
            .Fill.SetBackgroundColor(XLColor.FromHtml("#FFC1B4"));
        }
        public static IXLCell SetGreenIfEqualToPrevious(this IXLCell cell)
        {
            cell.CellLeft(1);
            var formula = $"={cell.Address}={cell.CellLeft(1).Address}";

            cell.AddConditionalFormat().WhenIsTrue(formula)
            .Fill.SetBackgroundColor(XLColor.FromHtml("#B4FFC8"));
            return(cell);
        }
        public static IXLCell SetRedIfFalse(this IXLCell cell)
        {
            cell.CellLeft(1);
            var formula = $"={cell.Address}=False";

            cell.AddConditionalFormat().WhenIsTrue(formula)
            .Fill.SetBackgroundColor(XLColor.FromHtml("#FFC1B4"));
            return(cell);
        }