using System;
using System.Linq;
using System.Text.RegularExpressions;
using System.Globalization;

namespace SODemo
{
	class MainClass
	{
		private static readonly CultureInfo CInfo = CultureInfo.CreateSpecificCulture("en-US");
		
		public static void Main (string[] args)
		{
			string segment = "51.54398, -0.27585;51.55175, -0.29631;51.56233, -0.30369;51.57035, -0.30856;51.58157, -0.31672;51.59233, -0.3354";
			
			var re = new Regex(@"\s*(?<lat>[-+]?[0-9.]+),\s*(?<lon>[-+]?[0-9.]+)\s*;", RegexOptions.Compiled | RegexOptions.CultureInvariant | RegexOptions.IgnoreCase);
			
			var locations = re.Matches(segment).Cast<Match>().Select(m => new 
			{
				Lat  = decimal.Parse(m.Groups["lat"].Value, CInfo),
				Long = decimal.Parse(m.Groups["lon"].Value, CInfo),
			});
				
			foreach (var l in locations)
			    Console.WriteLine(l);
		}
	}
}