1#================ 2# C# dependencies 3 4# cmake >=3.6 needed to build grpc_csharp_ext 5RUN apt-get update && apt-get install -y cmake && apt-get clean 6 7# Install mono 8RUN apt-get update && apt-get install -y apt-transport-https dirmngr && apt-get clean 9RUN apt-key adv --no-tty --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF 10RUN echo "deb https://download.mono-project.com/repo/debian stable-stretch main" | tee /etc/apt/sources.list.d/mono-official-stable.list 11RUN apt-get update && apt-get install -y ${'\\'} 12 mono-devel ${'\\'} 13 ca-certificates-mono ${'\\'} 14 nuget ${'\\'} 15 && apt-get clean 16