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Home/ Questions/Q 8756249
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Editorial Team
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Editorial Team
Asked: June 13, 20262026-06-13T14:02:06+00:00 2026-06-13T14:02:06+00:00

Ok so I have a WPF application that has a WinForms project in it.

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Ok so I have a WPF application that has a WinForms project in it. My main project is the WPF one. My question is how do I find all of the widows that are children of my Main Window that is WPF?? These Windows can be either WinForm or WPF so i need a way to determine of which type the child is to successfully close said form and all of its potential children.

Thank you in advance for the assistance

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  1. Editorial Team
    Editorial Team
    2026-06-13T14:02:08+00:00Added an answer on June 13, 2026 at 2:02 pm

    I have to guess a little but I think your WinForms forms aren’t actually children of the WPF MainWindow. I don’t see how they could be.

    So they’re probably just other non-main Windows in your application, not proper children.

    That means you have 2 collections to look at:

    • WinForms : System.Windows.Forms.Application.OpenForms
    • WPF : System.Windows.Application.Current.Windows

    Or maybe MainWindow.OwnedWindows for the WPF side.

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