VistaSaveFileDialog’s FilterIndex Does Not Reflect User’s Selection in Ookii Dialogs

[chloewxrn]

The FilterIndex property of VistaSaveFileDialog in the Ookii Dialogs library is not being updated to reflect the user’s selection in the file type dropdown. Despite changing the file format from the filter options in the dialog, the FilterIndex value remains the same as initially set, rather than reflecting the user’s final choice.

Expected Behavior
The FilterIndex should reflect the file type selected by the user in the dropdown (e.g., if the user selects "Word Documents (*.docx)", FilterIndex should correspond to that file type).

Actual Behavior
The FilterIndex is not updated and remains the same as it was before the user made their selection in the dialog.

Environment
.NET Framework: .NET 8.0 / .NET 4.8

*Side note: Also tested with MS Build SaveFileDialog and their FilterIndex is working fine.
OokiiSaveFileDialog.zip