using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CSharpStringSearch
{
    class Program
    {
        public void Run()
        {
            // Create 3 strings to work with
            string s1 = "http://www.bbc.co.uk";
            string s2;
            string s3;
            int index;

            // Search for first substring
            s2 = s1.Substring(0, 4);
            Console.WriteLine("Substring of \"" + s1 + "\" from index 0 (INCLUSIVE) to 4 (EXCLUSIVE):");
            Console.WriteLine(s2);

            // Search for next substring
            index = s1.LastIndexOf("/");
            s2 = s1.Substring(index + 1, 3);
            Console.WriteLine("\nSubstring from index after the last '/' (INCLUSIVE) to 3 (EXCLUSIVE) of \"" + s1 + "\" :");
            Console.WriteLine(s2);

            // Search for next substring
            index = s1.IndexOf(".");
            //Get the substring after the first dot
            s2 = s1.Substring(index + 1);
            s3 = s2.Substring(0, 3);
            Console.WriteLine("\nSubstring from index 0 (INCLUSIVE) to 3 (EXCLUSIVE)  after the first dot in " + s1);
            Console.WriteLine(s3);

            // Search for next substring
            index = s2.IndexOf(".");
            s3 = s2.Substring(index + 1, 2);
            Console.WriteLine("\nSubstring from the index after the second dot (INCLUSIVE) to 2 (EXCLUSIVE)  " + s1);
            Console.WriteLine(s3);

            // Search for last substring
            index = s1.LastIndexOf(".");
            s3 = s1.Substring(index + 1, 2);
            Console.WriteLine("\nSubstring from the index after the third dot (INCLUSIVE) to 2 (EXCLUSIVE)  " + s1);
            Console.WriteLine(s3 + "\n");
        }

        static void Main()
        {
            Program t = new Program();
            t.Run();
            Console.ReadLine();
        }
    }
}