/usr/share/doc/coinor-libcoinmp-dev/examples/csharp/bin/x64/Release/CoinMPTestCS9.exe.gz
/usr/share/doc/coinor-libcoinmp-dev/examples/csharp/bin/x86/Release/CoinMPTestCS9.exe.gz
You may install this package on Debian with
apt-get
install coinor-libcoinmp-dev