Refer to the DsPdf breaking changes for specific versions:

• Version 8.0.0
• Version 7.0.0
• Version 6.2.0
• Version 6.1.0
• Version 5.1.0.790
• Version 5.0.0.762
• Version 4.2.0.719
• Version 4.1.0.658
• Version 4.0.0.632 (Maintenance)
• Version 3.1.0.548

Refer to the DsPdfViewer breaking changes here:

• Version 3.1.2