using System;

​

namespace IDCSharp

{

   public class Program

    {

       public static void Main(string[] args)

        {

            string a = "Belajar Bahasa Pemrograman C# di IDCSharp.com";

            Console.WriteLine(a.Length);

​

            Console.WriteLine(a.IndexOf('.'));

            Console.WriteLine(a[4]);

​

             a = a.Insert(0, "Selamat ");

            Console.WriteLine(a);

​

            a = a.Replace("Selamat", "Saya Sedang");

            Console.WriteLine(a);

​

            if(a.Contains("Bahasa"))

                Console.WriteLine("Terdeteksi");

​

            a = a.Remove(4);

            Console.WriteLine(a);

            a = a.Substring(2);

            Console.WriteLine(a);

        }

    }

}