我需要在运行时下载字体文件，并将该字体应用于文本。我成功下载了字体文件，并在添加到Application.Current.Resources后将其添加到Windows.ApplicationModel.Package.Current.InstalledLocation (Debug\AppX\Assets)，但字体不适用于文本，但如果我手动将字体文件添加到应用程序Assets而不是(Debug\AppX\Assets)文件夹，则字体将成功应用。以下是我所做的完整代码

//Downloading font file
HttpClient client = new HttpClient();
var response = await client.GetByteArrayAsync("https://webfonts.sample.com/archivoblackregular/font.ttf");

//Creating font file in public space and writing all response to the file
StorageFolder PublicFontFolder = ApplicationData.Current.LocalFolder;
StorageFile fontfile = await PublicFontFolder.CreateFileAsync(fontFamily+".ttf",CreationCollisionOption.ReplaceExisting);
await File.WriteAllBytesAsync(fontfile.Path, response);

//Moving that file to the Assets folder as we don't have direct access to create file in Assets folder
StorageFolder AssetsFolder = await Windows.ApplicationModel.Package.Current.InstalledLocation.GetFolderAsync("Assets");
await fontfile.MoveAsync(AssetsFolder, fontfile.Name, NameCollisionOption.ReplaceExisting);
StorageFile AssetsFontFile = await AssetsFontFolder.GetFileAsync(fontfile.Name);

//Adding that font file to application resources
Application.Current.Resources[fontFamily] = new FontFamily(AssetsFontFile.Path + "#" + fontFamily);

我怎样才能完成我的要求？