Exemplu OOP inventar, C#

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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 Inventar{
        //Presupunem inventar de 10x5
        //Numerotat de la 1 la 50
        private static int[,] items = new int[51,2];
        // [posx, 0] = itmID;
        // [posx, 1] = itmCount;
        
        public Inventar(){
            //De aici citești un fișier în care ai puse toate datele despre
            //iteme, cum ar fi: imagine, nume, etc, etc :))
            //Poate chiar și proprietăți, depinde de ce stochezi
            Console.WriteLine("Obiect initializat");
        }
        
        public static void setItm(int pos, int itmID, int itmCount){
            items[pos,0] = itmID;
            items[pos,1] = itmCount;
        }
        
        public static void saveToFile(){
            string json = JsonConvert.SerializeObject(items);
            //Scrii în „inventar.data” stringul json
            Console.WriteLine("Salvat in fisier" + json);
        }
        
        public static void getFromFile(){
            //Iei din fișier textul
            //Presupunem ca apoi il salvezi in stringul json
            string json = "[[0,0],[5,4],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0]]";
            Console.WriteLine("Extras din fișier");
            //Îl parsezi, apoi îl salvezi
            string[,] deserialized = JsonConvert.DeserializeObject<string[,]>(json);
            for(int i=1;i<=50;i++){
                setItm(i, Int32.Parse(deserialized[i,0]), Int32.Parse(deserialized[i,1]));
                i++;
            }
        }
        
    }
    public class Program{
        public static void Main(string[] args){
            //Your code goes here
            Inventar inv = new Inventar();
            
            Inventar.setItm(1, 1, 4);
            Inventar.setItm(1, 3, 4);
            Inventar.setItm(1, 5, 4);
            
            Inventar.getFromFile();
            //Inventar.saveToFile();
            
            //Console.WriteLine(Inventar.test(1, 2));
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,28 sec, cpu time: 0,28 sec, average memory usage: 22 Mb, average nr of threads: 5