I'm a big fan of the Raspberry Pi. For $35 you can get a dedicated appliance that you can turn into any number of different devices.
I was trying to get a Visual Basic program of mine to compile today on a new installation of Raspbian and I came upon this error:
Error : VBNC2017: The library 'Microsoft.VisualBasic.dll' could not be found.
sudo ln -s /usr/lib/mono/4.0/Microsoft.VisualBasic.dll /usr/lib/mono/4.5/Microsoft.VisualBasic.dll