How to make CommonOpenFileDialog a modal window?

Hello,

I use CommonOpenFileDialog to make possible the choice of a folder but the window is not modal, it is possible to swith another window and run actions and I do not want that.

I would like that CommonOpenFileDialog is a modal window, in other word, not possible to swith another window.

Here is my code:

public static void ChooseFolder(TextBox textbox)
{
CommonOpenFileDialog openFolder = new CommonOpenFileDialog();
openFolder.InitialDirectory = textbox.Text;
openFolder.AllowNonFileSystemItems = true;
openFolder.Multiselect = false;
openFolder.IsFolderPicker = true;
openFolder.Title = "Select folder";
if (openFolder.ShowDialog() == CommonFileDialogResult.Ok)
{
textbox.Text = openFolder.FileName;
}
}
}

How to solve this issue?

Thanks.