Unable to get Manager,io to run on Linux Mint 17.1

[Zark]

You are on Mono v 3.2.8, you need to have 4.6.2.

How did you go about updating your version of mono?

Try these instructions:

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
echo "deb http://download.mono-project.com/repo/debian wheezy main" | sudo tee /etc/apt/sources.list.d/mono-xamarin.list
sudo apt-get update

@Zark

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
echo “deb Index of /repo/debian wheezy main” | sudo tee /etc/apt/sources.list.d/mono-xamarin.list
sudo apt-get update