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Editorial Team
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Asked: 2026-05-26T07:10:07+00:00

I’m trying to do this FolderBrowserDialog dlg = new FolderBrowserDialog(); dlg.RootFolder = C:\SomeUserSelectedFolder; But

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I’m trying to do this

FolderBrowserDialog dlg = new FolderBrowserDialog();
dlg.RootFolder = "C:\SomeUserSelectedFolder";

But RootFolder is a System.Environment.SpecialFolder.

Does this mean I can only set that to places like MyDocuments or the Desktop?!?

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1 Answer

  1. Editorial Team

    That’s correct: if the assigned value of RootFolder is not one of the Environment.SpecialFolder values then an InvalidEnumArgumentException is raised.

    You can set SelectedPath, though:

    If the SelectedPath property is set before showing the dialog box, the
    folder with this path will be the selected folder, as long as
    SelectedPath is set to an absolute path that is a subfolder of
    RootFolder (or more accurately, points to a subfolder of the shell
    namespace represented by RootFolder).

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