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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Text.RegularExpressions;
using System.IO;

namespace Test_1
{
    public partial class Form1 : Form
    {
        string[] content = new string[] {"Franz 21 Jahre", "Herbert 50 Jahre", "Alois 49 Jahre"};

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            var sr = new StreamReader(@"c:\abc.txt");

            var Persons = new List<Person>();
            while (!sr.EndOfStream)
            {
                Persons.Add(new Person(sr.ReadLine()));
            }
            sr.Close();
        }
    }

    class Person
    {
        public string Name { get; set; }
        public int Age { get; set; }

        private static Regex ParseExpression = new Regex(@"(.+) (\d+) Jahre", RegexOptions.Compiled);

        public Person(string rawdata)
        {
            var result = ParseExpression.Match(rawdata);
            Name = result.Groups[1].Value;
            Age = int.Parse(result.Groups[2].Value);
        }
    }
}					

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namespace Test_1
{
    public partial class Form1 : Form
    {
        private static Regex ParseExpression = new Regex(@"Temp_(\d+)=(\d+(,\d+)?)°C", RegexOptions.Compiled);

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            var Values = new List<double>();

            using (var sr = new StreamReader(@"c:\abc.txt"))
            {              
                while (!sr.EndOfStream)
                {
                    var line = sr.ReadLine();
                    var match = ParseExpression.Match(line);
                    Values.Add(double.Parse(match.Groups[2].Value));
                }  
            }
        }
    }
}