Hi Gabe,
Greetings from Syncfusion,
From our latest essential studio version 16.3.0.21, we have embedded our Pdfium.dll into PdfViewerControl to avoid referring the Pdfium.dll from the Pdfium folder. Due to this reason the file size is increased.
Use of Pdfium rendering engine.
PDF viewer control provides a robust rendering of PDF documents using the Pdfium rendering engine. It can now render complex shapes, images, and text without flaws.
Regards,
Karthik.