JsonPropertyAttribute required

This sample uses Argon.JsonPropertyAttribute to set Argon.Required which is used during deserialization to validate the presence of required JSON properties.

public class Videogame
{
    [JsonProperty(Required = Required.Always)]
    public string Name { get; set; }

    [JsonProperty(Required = Required.AllowNull)]
    public DateTime? ReleaseDate { get; set; }
}

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var json = """
    {
      'Name': 'Starcraft III',
      'ReleaseDate': null
    }
    """;

var starcraft = JsonConvert.DeserializeObject<Videogame>(json);

Console.WriteLine(starcraft.Name);
// Starcraft III

Console.WriteLine(starcraft.ReleaseDate);
// null

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