using System;

using System.Text.Json;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

​

        dynamic joy = JsonSerializer.Deserialize<object>("{ \"abc\": 123 }");

​

        dynamic yay = JsonSerializer.Deserialize<object>("[{ \"abc\": 456 }]");

​

        JsonElement getValue(JsonElement e) => e.ValueKind switch { JsonValueKind.Array => e[0], _ => e };

​

        Console.WriteLine(getValue(joy).GetProperty("abc"));

        Console.WriteLine(getValue(yay).GetProperty("abc"));

    }

}