OpenXml.Excel.Data.ExcelDataReader.GetSheetByName C# (CSharp) Method

        private Sheet GetSheetByName(string sheetName)
        {
            var sheet = GetSheets().FirstOrDefault(x => x.Name == sheetName);
            if (sheet == null)
                throw new ApplicationException(Error.NotFoundSheetName(sheetName));

            return sheet;
        }