https://www.youtube.com/watch?v=6sKaXWwfL38&list=PLO56HZSjrPTB4NxAsEP8HRk6YKBDLbp7m&index=73
using System;
using static System.Console;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Diagnostics;
using System.Reflection;
namespace testProject
{
   
    
    class Program
    {         
        static void Main(string[] args)
        {
            dynamic x;
            x = 1_234;
            WriteLine($"{x} - {x.GetType()}");
            x = "Dynamic Type!";
            WriteLine($"{x} - {x.GetType()}");
            string ss = "Hello";
            WriteLine(ss.Length);
            var vs = "Hello";
            WriteLine(vs.Length);
            dynamic ds = "Hello";
            WriteLine(ds.Length);
        }
    }
}



