using System;

using System.Linq; 

using System.Collections.Generic;

using System.Text.RegularExpressions; 

public class Program

{

    public static void Main()

    {

         string replace = $"<{0}>";

         string pattern = @"www.google.com(https?:\/\/[^\s]+)";

         var text =@"http://www.google.com";

         text = Regex.Replace(text, pattern, replace);

         Console.WriteLine(text);

    }

}