New Post: Neither stream 'Workbook' nor 'Book' was found in file

public static IExcelDataReader CreateBinaryReader(Stream fileStream)
{
  IExcelDataReader excelDataReader = (IExcelDataReader) new ExcelBinaryReader();
  excelDataReader.Initialize(fileStream);
  return excelDataReader;
}

public static IExcelDataReader CreateBinaryReader(Stream fileStream, ReadOption option)
{
  IExcelDataReader excelDataReader = (IExcelDataReader) new ExcelBinaryReader(option);
  excelDataReader.Initialize(fileStream);
  return excelDataReader;
}