我正在尝试使用CachingApplicationBlock缓存一些图像(这些图像需要很长时间才能渲染)BitmapSourcebitmapSource;///somebitmapsourcealreadycreated_cache///CachingApplicationBlockStringsomeId;//idforthisimage,usedasthekeyforthecacheusing(varstream=newMemoryStream()){PngBitmapEncoderencoder=newPngBitmapEncoder();encoder.Interlace=Pn