Json to C# Deserializing with Newtonsoft.Json

Question

i have json string like this.

{
  "pax": {
    "children_ages": [
      7,
      0
    ],
    "adult_quantity": 2
  },
  "room_category": "Standard",
  "room_description": "FAMILY ROOM STANDARD",
  "nightly_prices": {
    "2017-08-17": "217.81",
    "2017-08-18": "217.81",
    "2017-08-19": "217.81",
    "2017-08-20": "217.81",
    "2017-08-21": "217.81",
    "2017-08-22": "217.78"
  },
  "room_type": "DB"
}

after i create c# classes from it ,i can get following kind of classes set.

    public class Pax
{
    public List<int> children_ages { get; set; }
    public int adult_quantity { get; set; }
}

public class NightlyPrices
{
    public string __invalid_name__2017-08-17 { get; set; }
    public string __invalid_name__2017-08-18 { get; set; }
    public string __invalid_name__2017-08-19 { get; set; }
    public string __invalid_name__2017-08-20 { get; set; }
    public string __invalid_name__2017-08-21 { get; set; }
    public string __invalid_name__2017-08-22 { get; set; }
}

public class RootObject
{
    public Pax pax { get; set; }
    public string room_category { get; set; }
    public string room_description { get; set; }
    public NightlyPrices nightly_prices { get; set; }
    public string room_type { get; set; }
}

but this night prices is dynamic one.

"nightly_prices": {
        "2018-08-17": "217.81",
        "2017-08-18": "217.81",
        "2018-08-19": "217.81",
        "2018-08-20": "217.81",
        "2017-08-21": "217.81",
        "2017-08-22": "217.78"
      },

when response change then i cannot retrieve data for nightly_prices ,after deserializing process.

I already tried this by adding dictionary types also.but it doesn't work well.

Is there any different ways to handle this scenario?