I can't build website with VS 2015 and ChilKatDotNet 64Bit. I tried some versions of the .dll and the nugetpackage manager.
If I use it in .dll it wil work but not directly in the website project. If I try the 32 Bit version VS can make a build but the 64 Bit Version of IIS can't work with it.
change iis express to use 64bit as described above.