Neu in .NET 8.0 [31]: Erweiterte Serialisierung in System.Text.Json 8.0

public class Person
{
 [JsonConstructor] 
 // ohne Annotation: 'Deserialization of types without a 
 // parameterless constructor, a singular parameterized 
 // constructor, or a parameterized constructor annotated with 
 // 'JsonConstructorAttribute' is not supported. 
 internal Person(int id, string name, string website)
 {
  ID = id;
  Name = name;
  Website = website;
 }
 
 [JsonInclude] 
 // ohne Annotation: 'Each parameter in the deserialization 
 // constructor on type 'FCL_JSON+Person' must bind to an
 // object property or field on deserialization. Each parameter
 // name must match with a property or field on the object. 
 // Fields are only considered when
 // 'JsonSerializerOptions.IncludeFields' is enabled. 
 // The match can be case-insensitive.'
 
 internal int ID { get; }
 
 public string Name { get; set; }
 
 [JsonInclude] 
 // ohne Annotation: 'Each parameter in the deserialization
 // constructor on type 'FCL_JSON+Person' must bind to an object
 // property or field on deserialization. Each parameter name must
 // match with a property or field on the object. Fields are only
 // considered when 'JsonSerializerOptions.IncludeFields' is 
 // enabled. The match can be case-insensitive.'
 private string Website { get; set; }
 
 public override string ToString()
 {
  return $"{this.ID}: {this.Name} ({this.Website})";
 }
}
…
// Serialisierung
var p1 = new PersonWithoutParameterlessConstructor
  (42, Dr. Holger Schwichtenberg", "www.dotnet-doktor.de");
string json4 = JsonSerializer.Serialize(p1); 
Console.WriteLine(json4);
//{ "Name":"Dr. Holger Schwichtenberg","ID":42,"Website":"www.dotnet-doktor.de"}
 
// Deserialisierung
var p2 = 
  JsonSerializer.Deserialize<PersonWithoutParameterlessConstructor>(json4);
Console.WriteLine(p2);
//42: Dr.Holger Schwichtenberg (www.dotnet-doktor.de)