excel reports without excel object

Question

Want to generate excel report without using excel object in my code.Is there any best way to do it.I dont want to just import from data table.I need to do some formating and display heading in excel sheets.
Right now i am using Microsoft.Office.Interop.Excel and generating the reports.
Is there any way generating excel reorts using xml.Please advice me.
How can i do this c#? Please suggest me best options.
thanks