var instance = new GcSpread.Sheets.TableStyleInfo(backColor,
                                                 foreColor,
                                                 font,
                                                 borderLeft,
                                                 borderTop,
                                                 borderRight,
                                                 borderBottom,
                                                 borderHorizontal,
                                                 borderVertical,
                                                 textDecoration);
var value; // Type: TextDecorationType
value = instance.textDecoration;