Сериализация объектов JSON

[DataContract]
    public class Area
    {
        [DataMember]
        public string name;
        [DataMember]
        public string type;
        [DataMember]
        public string skill;
        [DataMember]
        public int complexity;
        [DataMember]
        public static int maxValueComplexity;

[DataContract]
    public class AreasOperator
    {
        [DataMember]
        public static List<Area> areas = new List<Area>();

public interface ISerialization
    {
        void Save<T>(List<T> data, string path);
        List<T> Restore<T>(string path);
    }
 
public class JSONSerialization : ISerialization
    {
        public void Save<T>(List<T> data, string path)
        {
            DataContractJsonSerializer jsonFormatter = new DataContractJsonSerializer(typeof(T[]));
            using (FileStream fileStream = new FileStream(path, FileMode.OpenOrCreate))
            {
                jsonFormatter.WriteObject(fileStream, data.ToArray());
            }
        }
 
        public List<T> Restore<T>(string filePath)
        {
            DataContractJsonSerializer jsonFormatter = new DataContractJsonSerializer(typeof(T[]));
            List<T> restoredData = new List<T>();
            using (FileStream fileStream = new FileStream(filePath, FileMode.OpenOrCreate))
            {
                T[] data = (T[])jsonFormatter.ReadObject(fileStream);
                restoredData.AddRange(data);
            }
            return restoredData;
        }
    }

private void Serialize(ISerialization serialization, string pathArea, string pathGuide, string pathRoute, string pathTour)
        {
            serialization.Save(AreasOperator.areas, pathArea);
            serialization.Save(GuidesOperator.guides, pathGuide);
            serialization.Save(RoutesOperator.routes, pathRoute);
            serialization.Save(TouresOperator.toures, pathTour);
        }
 
        private void Deserialize(ISerialization serialization, string pathArea, string pathGuide, string pathRoute, string pathTour)
        {
            AreasOperator.areas.Clear();
            GuidesOperator.guides.Clear();
            RoutesOperator.routes.Clear();
            TouresOperator.toures.Clear();
 
            AreasOperator.areas = serialization.Restore<Area>(pathArea);
            GuidesOperator.guides = serialization.Restore<RouteGuide>(pathGuide);
            RoutesOperator.routes = serialization.Restore<Route>(pathRoute);
            TouresOperator.toures = serialization.Restore<Tour>(pathTour);
            
            for (int i = 0; i < AreasOperator.areas.Count; i++)
            {
                areasBox.Items.Add(AreasOperator.areas[i].Name);
            }
            for (int i = 0; i < GuidesOperator.guides.Count; i++)
            {
                guidesBox.Items.Add(GuidesOperator.guides[i].FirstName);
                checkedGuidesBox.Items.Add(GuidesOperator.guides[i].FirstName);
            }
            for (int i = 0; i < RoutesOperator.routes.Count; i++)
            {
                routesBox.Items.Add(RoutesOperator.routes[i].StartPoint + " - " + RoutesOperator.routes[i].EndPoint);
            }
            for (int i = 0; i < TouresOperator.toures.Count; i++)
            {
                touresBox.Items.Add(TouresOperator.toures[i].TourName);
            }
        }
 
private void jSONSave_Click(object sender, EventArgs e)
        {
            
            JSONSerialization json = new JSONSerialization();
            string pathArea = Environment.CurrentDirectory.ToString() + @"\JSONSerialization\Areas.json";
            string pathGuide = Environment.CurrentDirectory.ToString() + @"\JSONSerialization\Guides.json";
            string pathRoute = Environment.CurrentDirectory.ToString() + @"\JSONSerialization\Routes.json";
            string pathTour = Environment.CurrentDirectory.ToString() + @"\JSONSerialization\Toures.json";
            Serialize(json, pathArea, pathGuide, pathRoute, pathTour);
        }