Investigating dotnet publish, RuntimeInformation and mono

Program.cs

using System;
using System.Runtime.InteropServices;

public class Program
{
    public static void Main()
    {
        Console.WriteLine(RuntimeInformation.IsOSPlatform(OSPlatform.Windows));
    }
}

project.json

{
  "version": "1.0.0-*",
  "buildOptions": {
    "debugType": "portable",
    "emitEntryPoint": true
  },
  "dependencies": {
    "System.Runtime": "4.0.0",
    "System.Runtime.InteropServices.RuntimeInformation": "4.0.0"
  },
  "frameworks": {
    "net451": {
    }
  }
}