using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace ConsoleApp2

{

    public class Program

    {

        public static void Main(string[] args)

        {

            dynamic a = 4;

            var b = a + 3;

​

            Console.WriteLine($"B: {b}");

​

            a = "4";

            var c = a + 3;

​

            Console.WriteLine($"C: {c}");

​

​

            Type t1 = typeof(string);

            Console.WriteLine(t1.FullName);

​

            Type t2 = typeof(int);

            foreach(var m in t2.GetMethods())

                Console.WriteLine(m.ToString());

​

​

            Type t3 = a.GetType();

            Console.WriteLine($"Type of a: {t3}");

        }

    }

}

​