using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
		var texts = new List<string> { "[10 .. 15)", "[100 .. 15.2)", "[10.431 .. 15)", "[-10.3 .. -5)", "[-10.4 .. 5.12)", "[10.4312 .. -5.1232)" };
    	var pattern = new Regex(@"^\[(-?\d+(?:\.\d+)?) \.\. (-?\d+(?:\.\d+)?)\)$");
        foreach (var s in texts) 
        {
        	Console.WriteLine($"---- {s} ----");
        	var match = pattern.Match(s);
        	if (match.Success) 
        	{
        		Console.WriteLine($"Group 1: {match.Groups[1].Value}, Group 2: {match.Groups[2].Value}");
        	}
        	else
        	{
        		Console.WriteLine($"No match found in '{s}'.");
        	}
        }
	}
}