public void ClearContent()
{
ProgressBar.Value = 0;
if (ImageContent.Source != null)
{
var bitmap = ImageContent.Source as BitmapImage;
bitmap.DownloadProgress -= Image_DownloadProgress;
}
ImageContent.DataContext = null;
ImageContent.ClearValue(Image.SourceProperty);
ImageContent.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
ImageContent.Height = 0;
TextContent.ClearValue(TextBlock.TextProperty);
}