using System;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
    var rx = new Regex(@"\[Title\]([^\[]+)\[/Title\]\[URL\]([^\[]+)\[/URL\]");
    var txt = "This site is used for business group. [Title]Business Group[/Title][URL]http://google.com[/URL]";
    var m = rx.Match(txt);
    Console.WriteLine(m.Groups[1]);
    Console.WriteLine(m.Groups[2]);
	}
}