using System;

public class Program

{

    public static void Main()

    {

        dynamic number = 123;

        number = number + 456;

        Console.WriteLine($"Value: {number}\tType: {number.GetType()}");

        number = "a string";

        Console.WriteLine($"Value: {number}\tType: {number.GetType()}");

        number = number - 1;

​

    }

}