HtmlSaveOptions ExportCidUrlsForMhtmlResources property. Specifies whether to use CID ContentID URLs to reference resources images fonts CSS included in MHTML documents. Default value is false in C#....ExportFontResources = true , PrettyFormat = true }; doc . Save ( ArtifactsDir...exportCidUrlsForMhtm ) { Assert . True ( outDocContents . Contains...