In the download, there are three platforms with C#, VB.NET source code. They can all be performed on .NET 2.0, .NET 3.5 and .NET 4.0. And the demos contain CSDemos-VS2005, CSDemos-VS2008 and CSDemos-VS2010.

Here is a list of the most useful guide of demos in the package:

How to write a string to an excel worksheet.
How to set Styles in an excel workbook.
How to read and write images
How to create charts
Export and Import data to DataTable
Read, write and calculate Formulas
Read and write hyperlinks
Extract and remove comments from an Excel workbook.
Read and write Rich texts
How to create freeze pane in an Excel workbook.
How to create group
How to create auto filters
How to write validation into spreadsheet
How to define page setup properties
The usage of VBA
The protection of the spreadsheet
Load and save excel file to stream
Read and write an excel file from XML
The usage of workbook designer
Set interior formatting in an excel wookbook.
Convert Excel documents to HTML, Image and PDF
How to insert rows into an excel workbook and copy data from existing cells.
How to sort the data of Excel.

To satisfy your requirements of compiling and running all these projects, you need to download Spire.XLS for .NET or higher. The Spire.XLS for .NET will run in evaluation mode by default, so a Spire.XLS license is required to be purchased.