Box value to modify it in-place in dictionary

mutable-dict-value.cs

using Microsoft.Extensions.Caching.Memory;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;

namespace ConsoleApp3 {
    public class Box<T> {
        public T Value;
        public Box(T value) {
            Value = value;
        }
        public override string ToString() => Value.ToString();
        public override int GetHashCode() => Value.GetHashCode();
        public override bool Equals(object obj) {
            if (obj is Box<T> box)
                return base.Equals(box) || Value.Equals(box.Value);
            return Value.Equals(obj);
        }
    }

    public static class Box {
        public static Box<T> Create<T>(T value) => new Box<T>(value);
    }

    class Program {
        static void Main(string[] args) {


            var x = JObject.Parse(@"{ ""x"": [1 ] }");

            Console.WriteLine(x["x"].GetType());

            x["z"] = new JObject();
            x["z"]["b"] = 100500;

            JObject y = new JObject();
            y["z"] = x["z"];
            x["b"] = y = (JObject)x["z"];
            y["b"] = 42;

            Console.WriteLine(x.ToString(Newtonsoft.Json.Formatting.Indented));
            Console.WriteLine(y.ToString(Newtonsoft.Json.Formatting.Indented));

            var a = new Dictionary<int, Box<int>>();
            a[1] = Box.Create(2);

            foreach (var kv in a) {
                kv.Value.Value = 4;
            }
            Console.WriteLine(a[1]);
        }
    }
}