Match Phone Number

using System;
using System.Text.RegularExpressions;
using System.Linq;
namespace Lekciq_02.Match_Phone_Number
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            Regex regex = new Regex(@"(?<start>^|[\s])(?<country>\+359)(?<separator>[\- ])(?<number>2)\k<separator>[0-9]{3}\k<separator>[0-8]{4}\b");
            MatchCollection matches = regex.Matches(input);

            var array = matches.Cast<Match>().Select(a => a.Value.Trim()).ToArray();

            Console.WriteLine(string.Join(", ", array));
        }
    }
}