This is an old, un-maintained MonoTouch Newtonsoft.Json library, check out Andrew Young's up to date port: https://github.com/ayoung/Newtonsoft.Json
This is an old, un-maintained MonoTouch Newtonsoft.Json library, check out Andrew Young's up to date port: https://github.com/ayoung/Newtonsoft.Json