NPOI.XSSF.UserModel.XSSFWorkbook.GetSheetName C# (CSharp) Method

        public String GetSheetName(int sheetIx)
        {
            ValidateSheetIndex(sheetIx);
            return sheets[sheetIx].SheetName;
        }

 public void TestLoadSample()
 {
     XSSFWorkbook workbook = new XSSFWorkbook(_ssSampels.OpenResourceAsStream("sample.xlsx"));
     Assert.AreEqual(3, workbook.NumberOfSheets);
     Assert.AreEqual("Sheet1", workbook.GetSheetName(0));
     ISheet sheet = workbook.GetSheetAt(0);
     IRow row = sheet.GetRow(0);
     ICell cell = row.GetCell((short)1);
     Assert.IsNotNull(cell);
     Assert.AreEqual(111.0, cell.NumericCellValue, 0.0);
     cell = row.GetCell((short)0);
     Assert.AreEqual("Lorem", cell.RichStringCellValue.String);
 }