The Excel Reports Library allows you to create Microsoft Excel Files without having Excel installed.  It is 100% managed code, there is no dependency on Excel at all.  Easily transform CSV strings, streams and files into Excel spreadsheets with a single line of code.  Create Excel worksheets from DataTables and from a list of class objects.  Create your own Excel templates and then do a search and replace of the values and save to a new file.  Other features include:

• Intellegent Cell Format defaults for .NET Types
• Ability to override the default column formatting with Excel formatting or .NET formatting
• Automatically nicely formatted headers
• Autowidth for columns
• Special handling for boolean values, MinDate, Enum, and null values
• Special handling when there are no rows
• Create spreadsheets completely in memory using streams
• Optional totaling for numeric fields