数据集导出为excel并在Excel中写入多个工作表

I have requirement in my project that data from multiple database tables should be exported as per sheet wise in excel file say if dataset contains 4 tables then table 0 should be country, table 1 should be state and so on...So please suggest me anything that works with exporting multiple datasheets to excel file at a time and excel should be generated at runtime. I am using C# ASP.NETI have requirement in my project that data from