After a long research I was not able to identify the issue, seems like it is dll internal problem, it loads pdf but kind of does not load background (or does not draw background for pdf)... anyway, my third party library is DevExpress, and I just realized that it has a pdf reader component, which wo...

Hi, I use your sample for WPF, it works fine. I try to attach it to my project which uses a lot of different 3rd party dlls, and built with .net core 3.1.3. I literally copy your WPF example to my project, and the only thing I changed is that instead of Window, I use it inside UserControl, then load...