private void Form1_Load(object sender, EventArgs e)
        {
            timer1.Start();
            timer1.Interval = 1000;

            //easier, so you don't have to retype it and make typos
            string fileName = @"C:\Users\Kim Le\Dropbox\HTX - Portfolio\Programering\Edit\KimLe2HTXEksame\KimLe2HTXEksame\data\data.txt";

            //if file exists, load it, if not, there is no data saved
            if (File.Exists(fileName))
            {
                //read all the lines in the file
                string[] lines = System.IO.File.ReadAllLines(fileName);
                //for each line in the file
                for (int i = 0 ; i < lines.Length ; i++)
                {
                    //convert the string to a date
                    DateTime dt = Convert.ToDateTime(lines[i]);
                    //put the date in your list
                    Organiseret.Add(dt);
                }
            }
        }