Comments by Louis T Klauder Jr (Top 2 by date)

The difference is that that link points to a NuGet package that provides a simple ready-to-use solution. Minor hitch caught by CHill60 is that it is in a note at the end of that page, that had not yet been passed on by the moderator, as follows:

As of 2020_07_26, there is a NuGet package: Ookii.Dialogs.Wpf.NETCore.
I needed a folder select dialog for a Core 3.1 WPF project.
In Visual Studio I installed that package and doing so added a reference thereto in Dependencies/Packages.
I added: using Ookii.Dialogs;
Then I get the desired behavior with the function:

private void pick_folder_Name_Click( object sender, RoutedEventArgs e )
{
// this is based on https://www.antoniovalentini.com/how-to-handle-file-and- folder-dialog-windows-in-a-wpf-application/

var ookiiDialog = new Ookii.Dialogs.Wpf.VistaFolderBrowserDialog( );
if ( ookiiDialog.ShowDialog( ) == true )
root_folder_TextBox.Text = ookiiDialog.SelectedPath;
}

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