How to set the string names of the coordinates of the graph along the x-axis?

Question

Windows Forms

so I set the type of values ​​of the x-axis to a line in the series settings for the chart,
but how to set the lines of divisions?

Answer 1

chart1.Series[0].Points.AddXY("aaa", 1);
chart1.Series[0].Points.AddXY("bbb", 2);
chart1.Series[0].Points.AddXY("ccc", 3);