Smart XLS examples?

I want to use the 开发者_高级运维Smart XLS library for dealing with excel files in C# (particularly because it can generate charts, and it's price is significantly lower than Aspose Cells), but I can't find any good examples for it. I just want to know how to create and modify charts, any guidance?

Maybe you could be interested in EPPlus:

• Open Source.
• Charting capabilities.
• Very good reputation.
• Active maintenance, last release is just 3 months old.

It only work with xlsx files so if if you need to work with xls, its not an option.