RestSharp list of non primitives contain all null values on deserialization

Question

I am trying to serialize a list over a RestSharp request. I am getting the correct number of items returned in the list, but their values are all blank. I've tried a lot of different attempts of Json annotations at JsonConvert, but this is the closest I have to working.

public string updateRewards(List<Reward> rewards)
{
        RestRequest request = new RestRequest(updateRewardsUrl, Method.POST);
        request.RequestFormat = DataFormat.Json;
        request.AddParameter("rewards", JsonConvert.SerializeObject(rewards));
        RestResponse response = (RestResponse)client.Execute(request);
 ...
}

[JsonObject]
public class Reward
{
    [JsonProperty("id")]
    public int id { get; set; }

    [JsonProperty("reward")]
    public string reward { get; set; }

    [JsonProperty("title")]
    public string title { get; set; }
}

On the other endpoint...

public object Post(UpdateRewardsRequestDTO updateRewardsRequest)
{
 ...handle request...
}

[Route("/Rewards/updateRewards", "POST")]
public class UpdateRewardsRequestDTO : IReturn<UpdateRewardsResponseDTO>
{
    public List<Reward> rewards { get; set; } //different Reward class, but exact same code as above
}

Sample RestRequest parameters

-   System.Collections.Generic.List<RestSharp.Parameter>
+       [0] {rewards=[{"id":0,"reward":"test","title":"test2"}]}    RestSharp.Parameter

Sample request received on the other endpoint

-       updateRewardsRequest    
-       rewards Count = 1   
-       [0] 
        id  0   int
        reward  null    string
        title   null    string

Could the problem be that two different instances of Reward are causing it to be unable to convert from one to the other?

Answer 1

I managed to get it working with a little hack.

The code on the first endpoint remains the same; the list of rewards is serialized using JsonConvert.SerializeObject(rewards).

On the second endpoint, I define the type of the rewards as a string instead of a List<Reward>. It shows up as an escaped json string. From there, I explicitly use JsonConvert.DeserializeObject<List<Reward>>(rewards) to convert into the list.