Hi,
Please check if below code works for you,
var _with1 = chart.Axes(ChartAxisPositionEnum.chAxisPositionCategory);
_with1.HasTitle = true;
_with1.Title.Caption = "Date";
_with1.Title.Font.Name = "Arial";
_with1.Title.Font.Size = 8;
_with1.Font.Size = 8;
_with1.Font.Name = "Arial";
Code is taken from
this article[
^] Or
this[
^] article may help you.
Let me know if it helps you,
Thanks
-Amit Gajjar