using System;

using System.Collections.Generic;

​

//https://stackoverflow.com/questions/58617273/unexpected-behavior-in-dictionary-methods-remove-and-clear-net-core

​

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Environment version: " + Environment.Version);

        Console.WriteLine();

​

        try

        {

            Test();

        }

        catch (Exception ex)

        {

            Console.WriteLine("Failed with unhandled exception: ");

            Console.WriteLine(ex);

            throw;

        }

    }

    public static void Test()

    {

        var dictionary = new Dictionary<int, string>();

        dictionary.Add(1, "Hello");

        dictionary.Add(2, "World");

        foreach (var entry in dictionary)

        {

            var count = dictionary.Count + 1;

            dictionary.Add(count, (count).ToString());

            Console.WriteLine("Added {0}", dictionary[count]);

        }

        Console.WriteLine("Count: {0}", dictionary.Count);

    }

}