Hi Weder,
Thank you for contacting Syncfusion Support.
We are unable to reproduce the issue “Type Syncfusion.Windows.Forms.Pdfviewer.ZoomMode is not available in the target framework” in our side. we suspect that this issue occurred due to the target framework mismatch. Kindly ensure that the target framework version is same while creating the application. We have attached the sample for your reference.
Kindly share the following details to analyze more on this issue and assist you with the better solution
1. Simple sample/ modify the above sample to reproduce the issue.
2. Replication procedure to reproduce the issue.
3. Product version that you are currently using.
Regards,
Vikas