WPF Error during loading XAML file

[grzegorz_kaczmarczyk]

Hi!

Sorry, if this topic is not in the appropriate section.

I am trying to create a WPF element according to WPF manual (point 5, page 23). I have already created a XAML file with no code behind and a .dll, then imported them into zenon (respectively into graphic and others). When I create a WPF element on the screen, the element is blank and I recieve an error message:

"The invocation of the constructor on type „WPFUserControlLibrary.UserControl1” that matches the specified binding constarints threw an exception"

If anyone had this problem and found a solution to it, I would really appreciate your help.

Best regards,
Grzegorz Kaczmarczyk
 

[grzegorz_kaczmarczyk]

I found the solution.

It turned out that the version of the .NET framework was incorrect. Initially it was .NET Core 3.0. Changing it to .NET Framework 3.5 eliminated the problem.

Regards,

Grzegorz Kaczmarczyk