Thanks for your posting and using Aspose.Cells.
Please see the following code to create this chart. I have also attached the output xls file generated by the code for your reference. I used the latest version: Aspose.Cells
for .NET v126.96.36.199 to generate this chart.
string filePath = @“D:\Downloads\Comparison.xls”;
Workbook workbook = new Workbook(filePath);
Worksheet worksheet = workbook.Worksheets;
int idx = worksheet.Charts.Add(ChartType.Column, 10, 10, 30, 30);
Chart ch = worksheet.Charts[idx];
Please send me the code like this- /