By default, graphs are created in a very basic form: the series have no title, a default color and thickness (maybe not the one you prefer) is used for all of them, the axes have no title either, no legend is shown, etc.
First of all, add a title to the series corresponding to the results of the model with the initial settings.
lineResults.Title = "Model results"
You can then customize the point series corresponding tot he measured data (now, tiny difficult to see white dots)
dataSeries.Title = "Measurements" dataSeries.Color = Color.Red dataSeries.Size = 4 dataSeries.LineVisible = True dataSeries.LineColor = Color.Black
Finally, add a title to the entire chart as a whole. Also, add their respective titles to the axes, and show the legend for the plot, which explains what the different series represent.
chart.Title = "Comparison measurements vs results" chart.TitleVisible = True chart.BottomAxis.Title = "Time" chart.LeftAxis.Title = "Waterlevel [m]" chart.LeftAxis.Automatic = False chart.LeftAxis.Maximum = 2 chart.LeftAxis.Minimum = 0 chart.Legend.Visible = True chart.Legend.Alignment = LegendAlignment.Bottom