public static void Main()
var bothJson = JsonSerializer.Serialize(both);
Console.WriteLine($"bothJson: {bothJson}");
var single = JsonSerializer.Deserialize<Single>(bothJson);
var singleJson = JsonSerializer.Serialize(single);
Console.WriteLine($"singleJson: {singleJson}");
public string First {get; set;}
public string First {get; set;}
public string Second {get; set;}