How to install Mono 2.6.7 in Ubuntu 12.04 without compiling from source

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http://askubuntu.com – I needed to debug an application developed for Mono 2.6.7, as the target environment only comes with that version, how do I install Mono 2.6.7 so I can debug on my Ubuntu 12.04? I tried to specify version when installing using apt-get, it will return version no found. I found some PPA, but it's for older version of Ubuntu. Thanks (HowTos)