Hi Beena,
Thank you for using Syncfusion products.
We can view multiple PDF documents in our PDF Viewer using the available
load() API.We have created a simple PDF Viewer sample to load the PDF document using load() and shared the same in the following location,
Note: We can also provide the Pdf document name/path of base64string in load() of the PDF Viewer. If the name of the Pdf document is provided in load() then that document path should be mapped in GetDocumentPath () of the PdfViewerController.cs
Please find the below UG link to getting started with PDF Viewer,
Please try this and revert us with more details about your requirement and the modified sample if the provided details do not satisfy you. It will be helpful for us to investigate further on your issue and assist you better.
Regards,
Akshaya