convert from PDF to Bimap

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PDF

Bitmap

Metro-design

In above comment, there was some mistakes. Sorry!!!
I read PDF content as byte[] and then I use above method. It doesn’t work.
But for the image (png, bmp, jpeg) byet[], it works properly
Why it doesn’t work for PDF byte[].
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FileOpenPicker filepickerOpen = new FileOpenPicker();
filepickerOpen.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
filepickerOpen.ViewMode = PickerViewMode.Thumbnail;
filepickerOpen.FileTypeFilter.Clear();
filepickerOpen.FileTypeFilter.Add(".png");
filepickerOpen.FileTypeFilter.Add(".pdf");
StorageFile storage= await filepickerOpen.PickSingleFileAsync();

byte[] buffer = WindowsRuntimeBufferExtensions.ToArray(await FileIO.ReadBufferAsync(storage));
using (MemoryStream ms = new MemoryStream(buffer))
{
var ims = new InMemoryRandomAccessStream();
DataWriter dataWriter = new DataWriter(ims);
dataWriter.WriteBytes(buffer);
dataWriter.StoreAsync();
ims.Seek(0);
BitmapImage img = new BitmapImage();
img.SetSource(ims);
ImageDocument.Source = img;
}
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