解决WPF通过Image显示的图片没办法删除

using (MemoryStream ms = new MemoryStream(File.ReadAllBytes(path)))                {                    imageSource = new BitmapImage();                    imageSource.BeginInit();                    imageSource.CacheOption = BitmapCacheOption.OnLoad;//设置缓存模式                    imageSource.StreamSource = ms;//通过StreamSource加载图片                    imageSource.EndInit();                    imageSource.Freeze();                    ImgViewer.Source = imageSource;                }