这项工作

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp2
{
         class Program
    {
        static void Main(string[] args)
        {
            string json = @"{""SoftHoldIDs"": 444,""AppliedUsages"": [    {""SoftHoldID"": 444,""UsageYearID"": 223232,""DaysApplied"": 0,""PointsApplied"": 1}],""Guests"": [ 1, 2]}";

            Rootobject reservationDto = JsonConvert.DeserializeObject<Rootobject>(json.ToString());

            Debug.WriteLine(reservationDto.SoftHoldIDs);
            foreach (var guest in reservationDto.Guests)
            {

                Debug.WriteLine(guest);
            }

        }
    }

    public class Rootobject
    {
        public int SoftHoldIDs { get; set; }
        public Appliedusage[] AppliedUsages { get; set; }
        public int[] Guests { get; set; }
    }

    public class Appliedusage
    {
        public int SoftHoldID { get; set; }
        public int UsageYearID { get; set; }
        public int DaysApplied { get; set; }
        public int PointsApplied { get; set; }
    }


}

首先使用visualstudio创建将json复制为类的类. 接下来，您在json响应中有双引号，因此请对其进行处理. Json.NET:使用双引号进行反序列化

First create class copying json as classwith visualstudio. Next you have double quote in json respons so deal with it. Json.NET: Deserilization with Double Quotes