Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms.... Add ( "Document.pdf" , options ); 将消息嵌入为附件...MapiAttachmentCollec 的 Insert 方法(MapiAttachmentCollec Insert(int index, string...