Path pointing to the page to add to the process.
The following example demonstrates adding a page to a GlobalCapture process.
Throws an InvalidOperationException if called on a GlobalAction process.
This method only supports adding single page files. If you wish to insert multiple pages, please separate the document into single page files through other means before adding them using this method or the InsertPage method.
You can only add PDF and TIF/TIFF files to a process document. Additionally, you can only add a file to a document if it matches the extension of the existing document. For example, it is not supported to add a TIF file to a PDF document.