Looking for an example Discovery response to a ALEXA SMARTHOME skill in .NET

I've been able to get this to work in Nodejs, but I'm missing something about how I need to respond to the Alexa.Discovery request using .net.

the JSON I send back is identical .. but I believe I need to be doing something to wrap the response differently perhaps ? .. I did notice that the response from .net is string formatted (has " for the json quotes) where the nodejs does not ..