public void Open()
        {
            ObservableCollection<DataItem> d = new ObservableCollection<DataItem>();
            ReadWriteDialog rwd = new ReadWriteDialog();
            List <string[]> content = rwd.ReadCSVFile(Window, out fileName);
            if (fileName != null)
            {
                Window.Title = fileName;
            }

            if (content != null)
            {
                foreach (var c in content)
                {
                    try
                    {
                        uint date = Convert.ToUInt32(c[0]);
                        double temperature = Convert.ToDouble(c[1]);
                        int place = Convert.ToInt32(c[2]);
                        d.Add(new DataItem(date, temperature, place % 3 == 0 ? METERS.NAMES.AIRPORT : (place % 3 == 1 ? METERS.NAMES.CENTER : METERS.NAMES.RUISSALO)));
                    }
                    catch (Exception)
                    {
                        MessageBox.Show("Error reading data in file, check its contents.");
                        Window.Close();
                    }
                }

            }


        }