Converting byte array to bitmap error at 'image.SetSource(stream);' Unspecified error

public static byte[] ConvertStringToBytes(string input)
        {
            MemoryStream stream = new MemoryStream();

            using (StreamWriter writer = new StreamWriter(stream))
            {
                writer.Write(input);
                writer.Flush();
            }

            return stream.ToArray();
        }

public BitmapImage ByteArraytoBitmap(Byte[] byteArray)
        {
            MemoryStream stream = new MemoryStream(byteArray);           

            byte[] bytes = byteArray as byte[];

            BitmapImage image = new BitmapImage();

            image.SetSource(stream);

            return image;
        }