/// <summary>
/// To return the area by the specified index. If the number of areas is smaller then the missing areas will be created automatically.
/// </summary>
/// <param name="chart">Chart.</param>
/// <param name="index">The area index.</param>
/// <returns>Area.</returns>
public static IChartArea GetArea(this IChart chart, int index)
{
if (chart == null)
{
throw new ArgumentNullException(nameof(chart));
}
if (index < 0)
{
throw new ArgumentOutOfRangeException(nameof(index));
}
while (chart.Areas.Count < index + 1)
{
var area = chart.CreateArea();
area.Title = LocalizedStrings.Panel + " " + index;
area.XAxisType = chart.XAxisType;
chart.Areas.Add(area);
}
return(chart.Areas[index]);
}
