Serialize object via microsoft own System.Text.JsonSerializer

1.install-package System.Text.Json

2.

static void SystemTextJsonJsonSerializerDemo()
        {
            var obj = new
            {
                Id = 1,
                Name = "Fred",
                Age = 34
            };
            string jsonValue = System.Text.Json.JsonSerializer.Serialize(obj);
            Console.WriteLine(jsonValue);
        }

3.Result:

{"Id":1,"Name":"Fred","Age":34}