Not handling reginal characters like å,ä,ö

[Zeith78]

I've noticed that downloading files that has umlauts or other similar non-standard english charaters results in a 404.
It will also give a 404 if it tries to download a file that has a # somewhere in its name.

Changing in MainWindow.xaml.cs (259):

try
{
   client.DownloadFile($"https://archive.org/download/{collectionName}/{file.Name}", destinationFilePath);
}

to:

try
{
   var fixed_filename = System.Uri.EscapeDataString(file.Name).ToString();
   client.DownloadFile($"https://archive.org/download/{collectionName}/{fixed_filename}", destinationFilePath);
}

fixes this problem. Its not the prettiest code, but it works.