/// <summary>
/// Creates an empty style and color for chart, ready to be customized
/// </summary>
public void CreateEmptyStyle(eChartStyle fallBackStyle = eChartStyle.Style2)
{
if (fallBackStyle == eChartStyle.None)
{
throw new InvalidOperationException("The chart must have a style. Please set the charts Style property to a value different than None or Call LoadStyleXml with the fallBackStyle parameter");
}
var p = _chart.WorkSheet.Workbook._package.Package;
var id = CreateStylePart(p);
StyleXml = new XmlDocument();
StyleXml.LoadXml(GetStartStyleXml(id));
StyleXml.Save(StylePart.GetStream());
Style = new ExcelChartStyle(NameSpaceManager, StyleXml.DocumentElement, this);
_chart.InitChartTheme((int)fallBackStyle);
CreateColorXml(p);
}