Saves the chart's layout to the specified file.
A String value, which specifies the path to the file where the layout should be stored. If an empty string is specified, an exception is raised.
The SaveToFile method saves the chart's layout (with information about the available series, their settings, etc.) to the specified file. The saved settings can then be restored from this file using the ChartControlSettings.LoadFromFile method.
For more information, refer to Storing the Chart Layout.