public static string MergeRTFFiles(IEnumerable<Chapter> chapters) { var rtfBuilder = new RTFBuilder(); foreach (var chapter in chapters) { rtfBuilder.BackColor(KnownColor.White); rtfBuilder.Font(RTFFont.CenturyGothic); rtfBuilder.FontSize(14); rtfBuilder.Alignment(StringAlignment.Center); rtfBuilder.AppendLine("\"" + chapter.ChapterName + "\""); rtfBuilder.AppendRTF(chapter.RTF); } return rtfBuilder.ToString(); }