Customizing the chart control x-axis labels

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ASP.NET

chart

I have a stacked chart control where I am displaying total number of items purchased (in Y-axis) against the supplier name in (in x-axis). Graph plots perfectly but problem is, its displaying the -1 and 3 on x-axis. How can I remove this.

What I have tried:

I tried with below code.

Chart1.ChartAreas[0].AxisX.IsMarginVisible = false;