How to add all the files in directory in ASP.NET and when i click on the link that file should get download?

How to add all the files in directory in ASP.NET and when i click on the
link that file should get download?

References

Reference NO 1

http://stackoverflow.com/questions/15186410/how-to-add-all-the-files-in-directory-in-asp-net-and-when-i-click-on-the-link-th

Reference NO 2

http://www.mikesdotnetting.com/Article/122/

Reference NO 3

http://msdn.microsoft.com/en-us/vs11trainingcourse_aspnetandvisualstudio_topic5.aspx

Reference NO 4

http://forums.asp.net/t/1219837.aspx

Reference NO 5

http://wordpress.org/support/topic/how-do-i-add-a-an-audio-file-to-my-blog-that-people-can-download

Reference NO 6

http://www.codeproject.com/Articles/31557/A-Beginner-s-Guide-to-ASP-NET-Application-Folders

Reference NO 7

http://www.nerdymusings.com/LPMArticle.asp?ID=8

Reference NO 8

http://devnet.kentico.com/Forums/f17/t5567/Link-to-files-in-a-document-type.aspx