How do I pick multiple files C# UWP?

Question

I'm building a music app and need to allow the user to pick multiple files. I've tried the FileOpenPicker with PickMultipleFilesAsync() and it crashes with unexpected error.

Browsed the C# documentation with no success.

var openPicker = new FileOpenPicker();
openPicker.ViewMode = PickerViewMode.Thumbnail;
openPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
IReadOnlyList<StorageFile> files = await openPicker.PickMultipleFilesAsync(); // <- crashes here

Answer 1

Give it filetypefilter and try again

openpicker.FileTypeFilter.Add(".csv"); //add the type of of file you are going to select for example ".csv"

Otherwise from this small snippet everything seems fine.