Official Box View .NET SDK. Allows to work with the API to upload documents and then generate customized sessions. Requirements include .NET 4.5 or newer. Installation link included. Also provided, instructions to get an Api Key and examples to see 17 interactive displays of the Box Viewer API.
The Google Realtime API has been deprecated, and the API will be shut down in January 2019. The company provides other products such as Google Cloud SQL, Firebase Realtime Database, and Google Cloud Firestore which should meet developers application development requirements.