public void TestCellsWithoutFormulas()
        {
            var          wb = new XLWorkbook();
            IXLWorksheet ws = wb.AddWorksheet("Test");

            IXLRange range = ws.Range(1, 1, 10, 10);

            range.Cell(1, 1).Value       = "Value";
            range.Cell(2, 2).Value       = "Value2";
            range.Cell(2, 2).Active      = true;
            range.Cell(3, 3).FormulaA1   = "=ROW()";
            range.Cell(4, 4).FormulaR1C1 = "=COLUMN()";
            range.Cell(5, 5).Style.Border.OutsideBorder = XLBorderStyleValues.Thin;
            range.Cell(6, 6).Style.Border.OutsideBorder = XLBorderStyleValues.Thin;
            range.Cell(6, 6).FormulaA1 = "=A1+B2";

            Assert.AreEqual(100, range.Cells().Count());
            Assert.AreEqual(97, range.CellsWithoutFormulas().Count());
            Assert.AreEqual(3, range.Cells(c => c.Active || c.Style.Border.TopBorder == XLBorderStyleValues.Thin).Count());
            Assert.AreEqual(2, range.CellsWithoutFormulas(c => c.Active || c.Style.Border.TopBorder == XLBorderStyleValues.Thin).Count());
        }