using System;

using System.Collections.Generic;

using System.Linq;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        string json = @"

            {

              ""travelClasses"": [

                {

                  ""fares"": [

                    {

                      ""referenceId"": ""a"",

                      ""fare"": {

                        ""tax"": 48.99,

                        ""totalFare"": 519.99,

                        ""currency"": {

                          ""code"": ""USD"",

                          ""exchangeRate"": 1

                        }

                      }

                    }

                  ],

                  ""availableSeats"": 9,

                  ""type"": ""Pro"",

                  ""code"": ""B"",

                  ""name"": ""UX""

                },

                {

                  ""fares"": [

                    {

                      ""referenceId"": ""b"",

                      ""fare"": {

                        ""tax"": 98.99,

                        ""totalFare"": 119.99,

                        ""currency"": {

                          ""code"": ""USD"",

                          ""exchangeRate"": 1

                        }

                      }

                    }

                  ],

                  ""availableSeats"": 9,

                  ""type"": ""Pro"",

                  ""code"": ""C"",

                  ""name"": ""UC""

                },

                {

                  ""fares"": [

                    {

                      ""referenceId"": ""c"",

                      ""fare"": {

                        ""tax"": 48.99,

                        ""totalFare"": 819.99,

                        ""currency"": {

                          ""code"": ""USD"",

                          ""exchangeRate"": 1

                        }

                      }

                    }

                  ],

                  ""availableSeats"": 9,

                  ""type"": ""Eco"",

                  ""code"": ""X"",

                  ""name"": ""US""

                }

              ]

            }";

​

        var root = JsonConvert.DeserializeObject<RootObject>(json);

        var bestTravelClass = root.TravelClasses

            .SelectMany(tc => tc.Fares, (tc, f) => new { TravelClass = tc, f.Fare.TotalFare })

            .OrderBy(a => a.TotalFare)

            .Select(a => a.TravelClass)

            .FirstOrDefault();

        Console.WriteLine("Name: " + bestTravelClass.Name);

        Console.WriteLine("Type: " + bestTravelClass.Type);

        Console.WriteLine("Code: " + bestTravelClass.Code);

        Console.WriteLine("Available Seats: " + bestTravelClass.AvailableSeats);

        Console.WriteLine("--- Fares ---");

        foreach (var fare in bestTravelClass.Fares)

        {

            Console.WriteLine("Reference ID: " + fare.ReferenceId);

            Console.WriteLine("Total Fare: " + fare.Fare.TotalFare + " " + fare.Fare.Currency.Code);

            Console.WriteLine("Tax: " + fare.Fare.Tax);

            Console.WriteLine();

        }

    }

}

​

public class RootObject

{

    [JsonProperty("travelClasses")]

    public List<TravelClass> TravelClasses { get; set; }

}

​

public partial class TravelClass

{

    [JsonProperty("fares")]

    public List<FareElement> Fares { get; set; }

​

    [JsonProperty("availableSeats")]

    public int AvailableSeats { get; set; }

​

    [JsonProperty("type")]

    public string Type { get; set; }

​

    [JsonProperty("code")]

    public string Code { get; set; }

​

    [JsonProperty("name")]

    public string Name { get; set; }

}

​

public partial class FareElement

{

    [JsonProperty("referenceId")]

    public string ReferenceId { get; set; }

​

    [JsonProperty("fare")]

    public FareFare Fare { get; set; }

}

​

public partial class FareFare

{

    [JsonProperty("tax")]

    public decimal Tax { get; set; }

​

    [JsonProperty("totalFare")]

    public decimal TotalFare { get; set; }

​

    [JsonProperty("currency")]

    public Currency Currency { get; set; }

}

​

public partial class Currency

{

    [JsonProperty("code")]

    public string Code { get; set; }

​

    [JsonProperty("exchangeRate")]

    public decimal ExchangeRate { get; set; }

}

​