text: public override String ToString(){StringBuilder sb = new StringBuilder();sb.Append(GetType().Name);sb.Append(" [");if (externalWorkbookNumber >= 0){sb.Append(" [");sb.Append("workbook=").Append(ExternalWorkbookNumber);sb.Append("] ");}if (sheetName != null){SheetNameFormatter.AppendFormat(sb, sheetName);}sb.Append(" ! ");sb.Append(ErrorConstants.GetText(ErrorConstants.ERROR_REF));sb.Append("]");return sb.ToString();}