anchor.diff:  
   
   
  -FROM microsoft/dotnet:2.0-runtime 
  +FROM microsoft/dotnet:2.2-runtime
   WORKDIR /app
   COPY --from=build-dotnet-env /opencvsharp/build ./
   RUN pwd
  -ENTRYPOINT ["ls"]+RUN ls
  +#ENTRYPOINT ["ls"]
positive.code: #ENV OPENCVSHARP_VERSION=4.0.0.20181130
  #ENV DOTNETCORE_SDK=2.1.104
  
  RUN apt update && apt install -y apt-transport-https software-properties-common \
  wget unzip curl nano git bzip2 ca-certificates grep sed dpkg #libicu57
  
  # Install opencv dependencies
  RUN cd ~
  RUN apt update && apt install -y build-essential cmake git gfortran libjpeg8-dev libpng-dev software-properties-common
  RUN add-apt-repository "deb http://security.ubuntu.com/ubuntu xenial-security main" && apt update && apt install -y libjasper1 libtiff-dev libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-dev libxine2-dev libv4l-dev
  
  RUN cd /usr/include/linux
  RUN ln -s -f ../libv4l1-videodev.h videodev.h
  RUN cd ~
  RUN apt install -y libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev libgtk2.0-dev libtbb-dev qt5-default libatlas-base-dev libfaac-dev libmp3lame-dev libtheora-dev libvorbis-dev libxvidcore-dev libopencore-amrnb-dev libopencore-amrwb-dev libavresample-dev x264 v4l-utils
  
  
  # Setup OpenCV Source
  RUN wget https://github.com/opencv/opencv/archive/${OPENCV_VERSION}.zip && unzip ${OPENCV_VERSION}.zip && rm ${OPENCV_VERSION}.zip && mv opencv-${OPENCV_VERSION} OpenCV
  
  # Setup opencv-contrib Source
  RUN wget https://github.com/opencv/opencv_contrib/archive/${OPENCV_VERSION}.zip && unzip ${OPENCV_VERSION}.zip && rm ${OPENCV_VERSION}.zip && mv opencv_contrib-${OPENCV_VERSION} OpenCV_contrib
  
  # Build OpenCV
  RUN cd OpenCV && mkdir build && cd build && \
  cmake \
  -D OPENCV_EXTRA_MODULES_PATH=/OpenCV_contrib/modules \
  -D CMAKE_BUILD_TYPE=RELEASE \
  -D BUILD_EXAMPLES=OFF \
  -D BUILD_DOCS=OFF \
  -D BUILD_PERF_TESTS=OFF \
  -D BUILD_TESTS=OFF \
  -D BUILD_opencv_java=OFF \
  -D BUILD_opencv_python=OFF \
  .. && make -j4 && make install && ldconfig
  
  WORKDIR /
  
  
negative.code: 
  FROM microsoft/dotnet:2.1-sdk AS build-dotnet-env
  COPY --from=build-native-env /opencvsharp/make/OpenCvSharpExtern/libOpenCvSharpExtern.so ./
  RUN git clone https://github.com/shimat/opencvsharp.git
  RUN pwd
  RUN ls
  
  