Converting JSON from API call to C# classes and pass between Blazor components

First time working with JSON in C#. I'm building a Blazor app using Amadeus API data (flights search) and I cannot seem to be able to use the JSON object in a Blazor component.

The error I'm getting is "Unhandled exception rendering component: The JSON value could not be converted to System.Collections.Generic.List`1[Flights.Models.RootObject]" which I think might be because I'm not building my C# classes correctly.

Here's a sample of the JSON object, not all but with the needed information:

{"data": [    {"type": "flight-destination","origin": "XOC","destination": "YJB","departureDate": "2025-08-19","returnDate": "2025-08-21","price": {"total": "60.0"      },"links": {"flightDates": "https://test.api.amadeus.com/v1/shopping/flight-dates?origin=XOC&destination=YJB&departureDate=2025-08-19,2025-08-21&oneWay=false&nonStop=false&viewBy=DESTINATION","flightOffers": "https://test.api.amadeus.com/v2/shopping/flight-offers?originLocationCode=XOC&destinationLocationCode=YJB&departureDate=2025-08-19&returnDate=2025-08-21&adults=1&nonStop=false&viewBy=DESTINATION"      }    },    {"type": "flight-destination","origin": "MAD","destination": "AUH","departureDate": "2025-07-22","returnDate": "2025-07-28","price": {"total": "679.07"      },"links": {"flightDates": "https://test.api.amadeus.com/v1/shopping/flight-dates?origin=MAD&destination=AUH&departureDate=2025-07-22,2025-07-28&oneWay=false&nonStop=false&viewBy=DESTINATION","flightOffers": "https://test.api.amadeus.com/v2/shopping/flight-offers?originLocationCode=MAD&destinationLocationCode=AUH&departureDate=2025-07-22&returnDate=2025-07-28&adults=1&nonStop=false&viewBy=DESTINATION"      }    }  ],"dictionaries": {"currencies": {"EUR": "Euro"    },"locations": {"MXP": {"subType": "AIRPORT","detailedName": "MALPENSA"      },"AMS": {"subType": "AIRPORT","detailedName": "SCHIPHOL AIRPORT"      }    }  },"meta": {"currency": "EUR","links": {"self": "https://test.api.amadeus.com/v1/shopping/flight-destinations?origin=MAD&departureDate=2025-07-16,2026-01-10&oneWay=false&nonStop=false&viewBy=DESTINATION"    },"defaults": {"departureDate": "2025-07-16,2026-01-10","oneWay": false,"duration": "1,15","nonStop": false,"viewBy": "DESTINATION"    }  },"warnings": []}

I then tried to mirror my C# classes to match the JSOn structure:

namespace Flights.Models{    public class RootObject    {        public Data[] data { get; set; }        public Dictionaries dictionaries { get; set; }        public Meta meta { get; set; }        public object[] warnings { get; set; }    }    public class Data    {        public string type { get; set; }        public string origin { get; set; }        public string destination { get; set; }        public string departureDate { get; set; }        public string returnDate { get; set; }        public Price price { get; set; }        public Links links { get; set; }    }    public class Price    {        public string total { get; set; }    }    public class Links    {        public string flightDates { get; set; }        public string flightOffers { get; set; }    }    public class Dictionaries    {        public Currencies currencies { get; set; }    }    public class Currencies    {        public string EUR { get; set; }    }    public class Meta    {        public string currency { get; set; }        public Links1 links { get; set; }        public Defaults defaults { get; set; }    }    public class Links1    {        public string self { get; set; }    }    public class Defaults    {        public string departureDate { get; set; }        public bool oneWay { get; set; }        public string duration { get; set; }        public bool nonStop { get; set; }        public string viewBy { get; set; }    }}

And the method I'm using to get the data into the destinations field so I can pass this one into a children component:

private List<RootObject> destinations;private async Task<List<RootObject>?> GetMostTravelledDestinations(string accessToken)    {        var request = new HttpRequestMessage(HttpMethod.Get, "https://test.api.amadeus.com/v1/shopping/flight-destinations?origin=MAD");        request.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", accessToken);        request.Headers.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));        var response = await Http.SendAsync(request);        if (response.IsSuccessStatusCode)        {            var json = await response.Content.ReadAsStringAsync();            var options = new JsonSerializerOptions { PropertyNameCaseInsensitive = true };            var parsed = JsonSerializer.Deserialize<List<RootObject>>(json, options);            if (parsed != null)            {                foreach (var rootObject in parsed)                {                    Console.WriteLine($"{rootObject.data}");                }                destinations = parsed;                using var doc = JsonDocument.Parse(json);                var root = doc.RootElement;                if (root.TryGetProperty("data", out var dataArray))                {                    Console.WriteLine($"Data contains {dataArray.GetArrayLength()} items.");                }                else                {                    Console.WriteLine("No 'data' property found.");                }                return parsed;            }        }        return new List<RootObject>();    }