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My HelixViewport3D is in the mainwindow. And I want to add children from UserControl to HelixViewport3D in MainWindow in WPF C# so please help me 

What I have tried:

public partial class MainWindow : Window
    public MainWindow()

        // Get the UserControl instance
        UserControl1 uc = (UserControl1)MainGrid.FindName("MyUserControl");

        // Add the UserControl to the HelixViewport3D as a child
Graeme_Grant 11-Feb-23 3:07am    
This is a 3rd-party control. Best place to ask is their support: Issues · helix-toolkit/helix-toolkit · GitHub[^]
Gerry Schmitz 11-Feb-23 13:18pm    
If you're using "FindName", it presumes it "has a name", and if it's not a template, it begs the question, why are you using "FindName" and not "the name" to reference the control.

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