how to reduce pdf file size using c# windows form

Hi Saber - There is no problem with the code. Your need to check few things :- 1) File path (handle escape characters) 2) File permissions (Itextsharp create problems with write protected and locked files) 3) Make sure the file is not corrupted. If you'll get the same error share the code and files you are using for compression If your client is ready to pay for the compression, you can also try some 3rd party tools like "neevia pdf compressor" for the same purpose. This tool will provide you features which you can use to impress your client..