$ sudo apt-get update
$ sudo apt-get install libmono-debugging-cil 

libmono-debugging-cil is installed in your system.

Make ensure the libmono-debugging-cil package were installed using the commands given below,

$ sudo dpkg-query -l | grep libmono-debugging-cil *

You will get with libmono-debugging-cil package name, version, architecture and description in a table

libmono-debugging-cil package basic information: