We recently released an update that introduces AES-256 bit and AES-128 bit encryption to our .NET PDF creation and merging library. We have offered encryption since 2002, but this was limited to RC4-40 bit and RC4-128 bit security until this release. We have also restructured the API a bit in order to easily accommodate new encryption methods in the future.

We get a decent amount of people who ask us about dynamically splitting a PDF. Splitting a PDF document using DynamicPDF Merger for .Net is a very simple task. With the few lines of code the document can be split efficiently at the desired page. Use of PdfDocument object allows for efficient reuse of imported PDF document data. If the same PDF needs to be reused in multiple parts of the application, load the PDF into a PdfDocument object and use it where ever needed. Also the PdfDocument object is designed to be thread safe.