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Split large PDF file in to multiple pdfs in C#

I have a big pdf record which I need to split into a couple of pdfs or chunks before I upload to the server(every other WCF carrier). I've approached to send massive files(>2 Mb) to the server with the aid of splitting them more than one pdfs or one pdf into chunks. Can anyone tell me this is a way to attain? I found the articles the use iTextSharp however it is a deprecated one. I do not use certified ones. Will we have any viable manner to obtain this?

I've followed the following article. However, they've used iTextSharp that is a deprecated one.