wpf 解决 编码解码器无法使用提供的流类型 The codec cannot use the type of stream provided

 BitmapImage bitImage = new BitmapImage();
                bitImage.BeginInit();
                bitImage.StreamSource = imageStreamSource;
                bitImage.EndInit();
                //JpegBitmapDecoder jpeDecoder=new JpegBitmapDecoder(imageStreamSource,BitmapCreateOptions.PreservePixelFormat,BitmapCacheOption.OnLoad);
                //ImageSource imageSource=jpeDecoder.Frames[0];
                ImageSource imageSource = bitImage;
                return imageSource;