public class User {

        public int UserId { set; get; }

        public string username { set; get; }

        public string password { set; get; }

        public string name { set; get; }

        public string email { set; get; }

        public string surname { set; get; }

        public string lastName { set; get; }

        public int age { set; get; }

        public DateTime regDate { set; get; }

        public bool userType { set; get; }
        //we define our relationships
        //1-1 UserModel-UserInfo
        public virtual UserInfo UserInfo { set; get; }
}

public class UserInfo {
    [Key, ForeignKey("User")]
    public int UserId { set; get; }

    public string username { set; get; }

    public string phone{ set; get; }

    public string adress { set; get; }

    public string country { set; get; }

    public string city { set; get; }

    public string zip { set; get; }

    //we define our relationships
    //1-1 UserModel-UserInfo
    public virtual User User { set; get; }

}

{
  "username": "otmanlicona",
  "password": "pwd1234",
  "name": "Otman",
  "email": "otmanlicona17@mail.com",
  "surname": "licona",
  "lastName": "ledezma",
  "age": 33,
  "regDate": "2017-03-01T18:10:11+00:00",
  "userType": false
}

[
  {
    "Orders": [],
    "ReviewProducts": [],
    "UserInfo": null,
    "UserId": 7,
    "username": "otmanlicona",
    "password": "pwd1234",
    "name": "Otman",
    "email": "otmanlicona17@mail.com",
    "surname": "licona",
    "lastName": "ledezma",
    "age": 33,
    "regDate": "2017-03-01T12:10:11",
    "userType": false
  },
  {
    "Orders": [],
    "ReviewProducts": [],
    "UserInfo": null,
    "UserId": 8,
    "username": "angelsilva",
    "password": "pwd1234",
    "name": "angel",
    "email": "angelsilva@mail.com",
    "surname": "silva",
    "lastName": "borja",
    "age": 22,
    "regDate": "2017-03-01T12:10:11",
    "userType": true
  }
]

{
  "UserId": 8,
  "username": "angelsilva",
  "phone": "12345678",
  "adress": "550 Swallow Hill",
  "country": "USA",
  "city": "foo",
  "zip": "47-253"
}