C#.NET官方类库Json序列化，反序列化

NuGet:搜索System.Text.Json  安装

引用：

using System.Text.Encodings.Web;
using System.Text.Json;
using System.Threading.Tasks;
using System.IO;

序列化方法：

        private static JsonSerializerOptions serializerOptions = new JsonSerializerOptions() { WriteIndented = true, Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping };
        public static string JsonSerialize<T>(T obj) => JsonSerializer.Serialize(obj, serializerOptions);
        public static void JsonSerialize<T>(T obj, string fileName)
        {
            using (FileStream createStream = File.Create(fileName))
            {
                JsonSerializer.Serialize(createStream, obj, serializerOptions);
            }
        }
        public static async Task JsonSerializeAsync<T>(T obj, string fileName)
        {
            using (FileStream createStream = File.Create(fileName))
            {
                await JsonSerializer.SerializeAsync(createStream, obj, serializerOptions);
            }
        }

反序列化方法：

        public static void JsonDeserialize<T>(string jsonString, out T obj) => obj = JsonSerializer.Deserialize<T>(jsonString);
        public static T JsonDeserialize<T>(string fileName) => JsonSerializer.Deserialize<T>(File.ReadAllText(fileName));
        public static async Task JsonDeserializeAsync<T>(string fileName)
        {
            using (FileStream openStream = File.OpenRead(fileName))
            {
                await JsonSerializer.DeserializeAsync<T>(openStream);
            }
        }