C# - Cannot deserialize JSON into List<T>

Question

I'm fetching a list of entries in a BD with a GET request (I'm using RestSharp to make the request) and I want to deserialize the content of the response into a List.

The type of list elements is "Mileage":

public class Mileage
{
    public int BranchId { get; set; }
    public int RouteId { get; set; }
    public int Travels { get; set; }
    public int Monday { get; set; }
    public int Tuesday { get; set; }
    public int Wednesday { get; set; }
    public int Thursday { get; set; }
    public int Friday { get; set; }
    public int Saturday { get; set; }
    public int Sunday { get; set; }
}

And the response.Content is like this:

{
"TheoreticalMileages": [
    {
      "BranchId": 36,
      "RouteId": 1860,
      "Travels": 10,
      "Monday": 132,
      "Tuesday": 89,
      "Wednesday": 92,
      "Thursday": 104,
      "Friday": 112,
      "Saturday": 0,
      "Sunday": 79
    },
    {
      "BranchId": 7,
      "RouteId": 2600,
      "Travels": 12,
      "Monday": 40,
      "Tuesday": 30,
      "Wednesday": 40,
      "Thursday": 100,
      "Friday": 121,
      "Saturday": 130,
      "Sunday": 0
    },
    {
      "BranchId": 23,
      "RouteId": 33,
      "Travels": 8,
      "Monday": 54,
      "Tuesday": 50,
      "Wednesday": 35,
      "Thursday": 50,
      "Friday": 67,
      "Saturday": 32,
      "Sunday": 30
    }
  ],
  "TotalRecords": 3
}

I'm using Newtonsoft JSON.NET to deserialize the object into a list of mileages. I've already tried to convert it to a List and an IEnumerable:

var mileages = JsonConvert.DeserializeObject<IEnumerable<Mileage>>(getAllResponse.Content);

But I get the same error with both types of collections: "Cannot deserialize the current json object because the type requires a json array[...]"

Is there a way to convert the object directly into a list? Thanks in advance.

Answer 1

The JSON you're using isn't a list. It's an object. One of its properties happens to be a list. Something like this:

public class MileageContainer
{
    public IEnumerable<Mileage> TheoreticalMileages { get; set; }
    public int TotalRecords { get; set; }
}

Then you should be able to deserialize the JSON into that object:

JsonConvert.DeserializeObject<MileageContainer>(getAllResponse.Content);