using System;

using System.Collections.Generic;

using System.Runtime.CompilerServices;

​

public class C

{

    public List<object> objectList = new();

    public void M(string value)

    {

        List<string> hey = Unsafe.As<List<string>>(this.objectList);

        hey.Add(value);

    }

}

​

public static class Program

{

    public static void Main()

    {

        C c = new();

        c.M("hey!");

        foreach(object wow in c.objectList)

        {

            Console.WriteLine(wow);

        }

    }

}