using System;

using System.Text.RegularExpressions;

​

public class Program

{

    public static void Main()

    {

        string input = "(Brazil • Bastos, Sao Paulo • 2009) (Thrash Metal/Crossover)";

        string result = Regex.Replace(input, @"(\([^\)]*\)) (\([^\)]*\))", "$2 $1");

        Console.WriteLine( result);

    }

}