This is the list of changelogs of Spire.DocViewer New release and hotfix. You can get the detail information of each version's new features and bug solutions.
Free Trail to evaluate Spire.DocViewer here:
http://www.e-iceblue.com/Download/download-docviewer-for-net-now.html
Change logs:
https://www.e-iceblue.com/news/spire-docviewer.html