Hi Swapna,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
Well, you are using a very old version of Aspose.Pdf for .NET and I am not sure whether these feature were a part of that release or not. However, both of these features i.e. concatenation of PDF files and adding bookmarks are available in our latest releases. We would suggest you to upgrade to the latest version to utilize these features and many of the new features supported in our current release. You may download and try our latest version Aspose.Pdf for .NET v6.3.0 from the following link and see if it fits your needs.
Following are the links to the details and sample code regarding concatenating PDF files:
Concatenate PDF Files Using File Paths (Facades)
Concatenate Array of PDF Files Using File Paths (Facades)
Concatenate PDF Files Using Streams (Facades)
Concatenate Array of PDF Files Using Streams (Facades)
Following are the links to the details and sample code regarding adding bookmarks in existing PDF files:
Working with Bookmarks
In case you need any further details, please feel free to contact support.
Thank You & Best Regards,