using System;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
		string subjectString = "Hello I'm 43 years old, I need 2 burgers each for 1.99$";
		MatchCollection mc = Regex.Matches(subjectString, "\\d+(\\.\\d+)?");
		foreach (Match m in mc)
		{
		    Console.WriteLine(double.Parse(m.Groups[0].Value));
		}
	}
}