[C#] 타입캐스트 TypeCasting (Convert class)

using System;

namespace MyFirstProgram
{
    internal class Program
    {
        static void Main(string[] args) // main method
        {

            double x = 3.14;
            int x_2 = Convert.ToInt32(x);
            Console.WriteLine(x.GetType());
            Console.WriteLine(x_2.GetType());

            double d = Convert.ToDouble(x_2) + 0.14;
            Console.WriteLine(d.GetType());

            // int e = 321;
            double e = 312.123;
            String f = Convert.ToString(e);
            Console.WriteLine(f.GetType());

            String g = "$";
            char h = Convert.ToChar(g);
            Console.WriteLine(h);
            Console.WriteLine(h.GetType());

            String i = "true";
            bool j = Convert.ToBoolean(i);
            Console.WriteLine(j);
            Console.WriteLine(j.GetType());

        }
    }
}