//=======================================================================================
        // Menu: File | Add | New time series...
        //=======================================================================================
        private void newTimeSeriesToolStripMenuItem_Click(object sender, EventArgs e)
        {
            TimeSeriesCreationDialog timeSeriesCreationDialog = new TimeSeriesCreationDialog();
            timeSeriesCreationDialog.ShowDialog();
            timeSeriesGroup.Items.Add(timeSeriesCreationDialog.TimeSeries);
            
            this.tsPlot.Initialize();
            this.tsPlot.Repaint();
            this.tsPlot.Visible = true;
            timeSeriesGroup.Current = timeSeriesGroup.Items.Count - 1;

        }
 //=====================================================================================================
 //  Menu: File | New... 
 //=====================================================================================================
 private void newToolStripMenuItem_Click(object sender, EventArgs e)
 {
     TimeSeriesCreationDialog timeSeriesCreationDialog = new TimeSeriesCreationDialog();
     timeSeriesCreationDialog.ShowDialog();
     this.timeSeriesGroup = new TimeSeriesGroup();
     BaseTimeSeries timeseries = timeSeriesCreationDialog.TimeSeries;
     timeSeriesGroup.Items.Add(timeseries);
     if (timeseries is TimestampSeries)
     {
         this.timestampSeriesGrid.TimeSeriesData = (TimestampSeries)timeseries;
         this.timespanSeriesGrid.Visible = false;
         this.timestampSeriesGrid.Visible = true;
     }
     else if (timeseries is TimespanSeries)
     {
         this.timespanSeriesGrid.TimeSeriesData = (TimespanSeries)timeseries;
         this.timestampSeriesGrid.Visible = false;
         this.timespanSeriesGrid.Visible = true;
     }
     this.tsPlot.TimeSeriesDataSet = this.timeSeriesGroup;
     this.tsPlot.Repaint();
     this.tsPlot.Visible = true;
     
 }