Setting Json Serializer Settings

[adriaanp]

How would we change serializer settings for the json serializer?

[yishaigalatzer]

There are a few ways to get json out of MVC.

1. Return a JsonResult. If you do that just set the JsonSettings property with your settings.
   https://github.com/aspnet/Mvc/blob/dev/src/Microsoft.AspNet.Mvc.Core/ActionResults/JsonResult.cs
2. Return an object and let content negotiation take it's place. In that case you want to access the JsonOutputFormatter from MvcOptions and replace it with a new one constructed with SerializerSettings.

https://github.com/aspnet/Mvc/blob/dev/src/Microsoft.AspNet.Mvc.Core/ActionResults/JsonResult.cs

[yishaigalatzer]

@harshgMSFT we should also expose the serializersettings on the formatter as a property. It will make it much more discoverable and easier to change by user.

[yishaigalatzer]

also cover the scenario is #1215 (so both input/output formatters gets the settings and default settings static method).