Step-by-step – Mono Installation in Debian Buster

Installing

2. 2. Setting Up Mono Repository

   How to Add the Mono Repo for Linux Debian

   Mono Repository Setup

   Mono Debian Apt Repo Setup.

3. 3. Installing Mono

   Finally, to Install Mono for Linux Debian
   Simply play:

   sudo apt install mono-devel

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.