/// <summary>
        ///  Action for the File->Open command.
        /// </summary>
        ///
        public void Open_Execute(object sender)
        {
            var dlg = new OpenFileDialog()
            {
                FileName         = "Sample",
                DefaultExt       = ".csv",
                Filter           = loadFormats.GetFilterString(true),
                FilterIndex      = loadFormats.IndexOf("*.csv") + 1,
                InitialDirectory = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Resources\\Samples\\")
            };

            if (!String.IsNullOrEmpty(lastSavePath))
            {
                dlg.InitialDirectory = lastSavePath;
            }

            // Show open file dialog box
            var result = dlg.ShowDialog();

            if (result == true)
            {
                // Get the chosen format
                var fmt = loadFormats[dlg.FilterIndex - 1];

                DataTable table = fmt.Read(new FileStream(dlg.FileName, FileMode.Open));

                double[][] values = table.ToJagged();

                Values.Clear();
                foreach (double[] row in values)
                {
                    var sample = new SampleViewModel();
                    sample.Value = row[0];
                    if (row.Length > 1)
                    {
                        sample.Weight = row[1];
                    }
                    Values.Add(sample);
                }
            }
        }