I experimented to run Interaction Interactors 101 sample in CoreSDK. I use VS 2015.
It runs with Any CPU + “Prefer 32-Bit”.
It neither run with “Any CPU + NOT prefer 32bit” nor “64bit target”. They show the same error “BadImageFormatException” at the line of “var host = new Host();”
VS 2015 configuration manager of Tobii SDK projects, even 64 bit does not show up in configuration choice menu.