facebook-csharp-sdk/simple-json — pull request #44 by Haacked (2014-02-19 17:24:27+00:00)
Title: Add support for .NET 4.5 readonly collections

This also adds a new compiler constant: `SIMPLE_JSON_READONLY_COLLECTIONS` for
platforms that support `IReadOnlyList<>` and `IReadOnlyCollection<>`

/cc @shiftkey