project.json

{
  "dependencies": {
    "System.Runtime": "4.4.0-beta-24903-01",
    "System.Runtime.Serialization.Primitives": "4.4.0-beta-24903-01",
    "System.Runtime.Serialization.Formatters": "4.4.0-beta-24903-01"
  },
  "frameworks": {
    "netstandard1.7": {}
  }
}