Could not load file or assembly 'Newtonsoft.Json, Version=3.5.0.0

Question

I am working in c# 4.0 to read a signed request I am using the following code

FacebookApp fap = new FacebookApp();
fap.AppId = \"789485219211963\"; // App ID         


        

Answer 1

When I ran into this problem, I found that there were 2 similar folders in yourproject/packages, one is version 6.0.5, another is 5.0.6.

I deleted the 5.0.6 and the problem disappeared.