I'm trying to build a wp8.1+win8.1 portable class library with enabled Runtime checking Code contracts, but it fails with the following error: Reading assembly 'Newtonsoft.Json' from '..packages\Newtonsoft.Json.6.0.8\lib\portable-net40+sl5+wp80+win8+wpa81\Newtonsoft.Json.dll' resulted in errors. Could not resolve type reference: [mscorlib]System.IConvertible
What can be done about this? Thanks!