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Editorial Team
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Asked: 2026-05-23T20:15:35+00:00

In .net Compact Framework 2.0, you could add a form to another forms control

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In .net Compact Framework 2.0, you could add a form to another forms control array basically parenting the other form.

i.e._mainForm.Controls.Add(form);

This is not allowed in .net cf 3.5 and results in an exception:

System.ArgumentException: Value does not fall within the expected range.
at Microsoft.AGL.Common.MISC.HandleAr(PAL_ERROR ar)
at System.Windows.Forms.Control._SetParent(Control ctlParent)
at System.Windows.Forms.Control.set_Parent(Control value)

Is there a workaround or alternative for this? I need to be able to parent a form inside a panel on another form.

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1 Answer

  1. Editorial Team

    I think this contains answer to your question: http://207.46.16.248/en-us/netframework/bb986636.aspx

    especially this part:

    System.Windows.Forms.Form.Parent

    Description
    Forms can no longer be parented.

    Previous Behavior
    In .NET Compact Framework 1.0, forms could be parented to any other control
    that supported child controls. In .NET Compact Framework 2.0, forms
    could be parented to any other form.

    New Behavior

    In the .NET Compact
    Framework version 3.5, forms cannot be parented.

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