According to [#330](https://github.com/reactjs/React.NET/issues/330) json should be converted by default. But if we use this example `@Html.React("ReactWorld", new { Name = "World" })` it will be rendered as `ReactDOM.hydrate(React.createElement(ReactWorld, {"Name":"World"}),...` Minimal [repo](https://github.com/igorroch/React.NET-issue-531) to reproduce.