C#

{ 
    "statistiques": 
    {
      "number":20944
    }
}

public class statistiques
{
 public int number;
};

string raw = File.ReadAllText(@"C:\data.json"); // the string is valid.
statistiques allStats = JsonConvert.DeserializeObject<statistiques>(raw);

public class RootObject
    {
        public Statistiques statistiques { get; set; }
        public List<Circonscription> circonscriptions { get; set; }
    }

using System;
using System.Threading;
using System.Threading.Tasks;

namespace CrazyAsync
{
    class Foo
    {
        public Func<CancellationToken, Task> Work;

        public async Task DoWork(CancellationToken token)
        {
            while (!token.IsCancellationRequested)
                await Work?.Invoke(token);
        }
    }
    class Mamamia
    {
        public Task DoIt(CancellationToken token)
        {
            var t = Task.Delay(6, token);
            t.ContinueWith(x => 
            {
                if (x.Status == TaskStatus.Faulted)
                    Console.WriteLine(x.Exception.InnerException);

                if (i++ % 100 == 0)
                {
                    GC.Collect();
                    Program.DumpMemory();
                }
            });
            return t;
        }
        int i = 0;
    }
    class Program
    {
        static async Task Main(string[] args)
        {
            var cc = new CancellationTokenSource(TimeSpan.FromMinutes(1));
            var m = new Mamamia();
            var foo = new Foo()
            {
                Work = m.DoIt,
            };

            await foo.DoWork(cc.Token);
        }
        public static void DumpMemory()
        {
            var m = Environment.WorkingSet;
            Console.WriteLine($"Mem: {m:#,###}");
        }
    }
}

static void Main(string[] args)
{
    Random r = new Random();
    const int size = 9;
    int[,] arr = new int[size, size];
    for (int i = 0; i < size; i++)
    {
        for (int j = 0; j < size; j++)
        {
            arr[i, j] = r.Next(-2, 4);
            Console.Write(arr[i, j] + " ");
        }
        Console.WriteLine(" ");
    }
    Console.ReadKey();