I'm want to create a my own Coffee shop app for semester's project. It's Windows Phone App. The App can i.e. view who is check-in here now , view menu , view photo by using 4SQ Endpoint APIs. And my problem is I don't know how to start it...which book i should read about C# and I don't know which knowledge (keyword) should i google it i.e. GET POST METHOD , JSON I ever used 4SQ Endpoint APIs once with javascript (jquery) $.ajax{(.....)} to get data from 4SQ Endpoint APIs So I googled and found JSON.NET Class but I don't know how to use it because i never programming in C# I'm just begin programming. I can programming in C only. Thank you Sorry for my bad grammar