SOExample, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using Newtonsoft.Json;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            string json = "{\"Settings\":{\"Size\":20}}";

AppSettings rootObject = JsonConvert.DeserializeObject<Settings>(json);
            rootObject.Settings.Size = 20;
            
            var output = JsonConvert.SerializeObject(rootObject);
            Console.WriteLine(output);
            
            Console.WriteLine();
            Console.WriteLine("-vs-");
            Console.WriteLine();
            
            var output2 = JsonConvert.SerializeObject(rootObject, Formatting.Indented);
            Console.WriteLine(output2);
        }
    }
    
    public class AppSettings
    {
        public InnerSettings Settings {get;set;}
    }
    
    public class Settings : AppSettings
    {
    }
    
    public class InnerSettings
    {
        public int Size {get;set;}
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,17 sec, absolute running time: 0,45 sec, cpu time: 0,45 sec, average memory usage: 26 Mb, average nr of threads: 5, absolute service time: 0,65 sec