Syncfusion.SpreadsheetHelper.Windows Custom GraphicCellRenderer for celltype. Converter used to convert the XlsIO chart into the SfChart or Image. Creates an instance of Creates a new . Initialize or update the properties of and its content. Contains classes which are required to load the Charts and Sparklines into the Spreadsheet. Custom GraphicCellRenderer for celltype. Converter used to convert the XlsIO chart into the SfChart or Image. Creates an instance of Creates a new . Initialize or update the properties of and its content. CellRenderer which is used to render the Sparkline into the Cell. CellRenderer which is used to render the Sparkline into the Cell. Used to get the itemsSource of Sparkline.