> //① 직렬화(serialize) 데모 
. Shirt shirt1 = new Shirt 
. { 
.     Name = "Red Shirt", 
.     Created = new DateTime(2020, 01, 01), 
.     Sizes = new List<string> { "Small" } 
. }; 
. string json1 = JsonConvert.SerializeObject(shirt1, Formatting.Indented); 
. Console.WriteLine(json1); 
{ 
  "Name": "Red Shirt", 
  "Created": "2020-01-01T00:00:00", 
  "Sizes": [ 
    "Small" 
  ]
}