GtkSharp/Source/Samples/Sections/Dialogs
Sebastien Pouliot fd3eb0c839 Add FileChooserDialog to samples app
This shows the original issue on macOS/arm64 (if the rest of the PR is
not applied)

```
GLib.GException: Invalid byte sequence in conversion input
   at GLib.Marshaller.FilenamePtrToString(IntPtr ptr) in /Users/poupou/git/external/GtkSharp/Source/Libs/GLibSharp/Marshaller.cs:line 62
   at GLib.Marshaller.FilenamePtrToStringGFree(IntPtr ptr) in /Users/poupou/git/external/GtkSharp/Source/Libs/GLibSharp/Marshaller.cs:line 68
   at Gtk.FileChooserDialog.get_Filename() in /Users/poupou/git/external/GtkSharp/Source/Libs/GtkSharp/Generated/Gtk/FileChooserDialog.cs:line 222
   at Samples.FileChooserDialogDemo.OnPressed() in /Users/poupou/git/external/GtkSharp/Source/Samples/Sections/Dialogs/FileChooserDialogSection.cs:line 28
   at Gtk.Button.Pressed_cb(IntPtr inst) in /Users/poupou/git/external/GtkSharp/Source/Libs/GtkSharp/Generated/Gtk/Button.cs:line 388
   at GLib.ExceptionManager.RaiseUnhandledException(Exception e, Boolean is_terminal) in /Users/poupou/git/external/GtkSharp/Source/Libs/GLibSharp/ExceptionManager.cs:line 58
   at Gtk.Button.Pressed_cb(IntPtr inst) in /Users/poupou/git/external/GtkSharp/Source/Libs/GtkSharp/Generated/Gtk/Button.cs:line 388
   at Gtk.Application.Run() in /Users/poupou/git/external/GtkSharp/Source/Libs/GtkSharp/Application.cs:line 115
   at Samples.Program.Main(String[] args) in /Users/poupou/git/external/GtkSharp/Source/Samples/Program.cs:line 44
```
2022-04-24 11:18:36 -04:00
..
AboutDialogSection.cs [Samples] Update section name handling 2018-01-27 21:47:02 +01:00
FileChooserDialogSection.cs Add FileChooserDialog to samples app 2022-04-24 11:18:36 -04:00