S22.Imap is an easy-to-use and well-documented .NET library component for communicating with and receiving electronic mail from an Internet Message Access Protocol (IMAP) servers. It supports IMAP IDLE notifications and IMAP over SSL, allows selective fetching of parts of mail messages, is inherently thread-safe, and is well documented with lots of example code.
Aspose. Pdf. Kit is a .NET component for editing existing PDF files. You can also use it to add or remove digital signatures and encrypt or decrypt a PDF. It supports many useful features like PDF stamp creation, adding a CJK font in a form field, AcroForm, adding a watermark or logo, extracting or adding images and text, adding bookmarks, appending pages, and converting a PDF file to TIFF, BMP, PNG, and JPG image formats. It enables you to concatenate PDF files and allows adding or setting XMP Metadata to an existing PDF.