[JsonProperty(Required = Required.Always)]
public string Name { get; set; }
[JsonProperty(Required = Required.AllowNull)]
public DateTime? ReleaseDate { get; set; }
public static void Main()
Videogame starcraft = JsonConvert.DeserializeObject<Videogame>(json);
Console.WriteLine(starcraft.Name);
Console.WriteLine(starcraft.ReleaseDate);