Hi,

Advantages of using Enterprise Library:

A solid data access layer (DAL) can benefit an application by hiding redundant tasks, helping handle exceptions more gracefully, helping clean up resources more efficiently, and providing a layer of abstraction from the database.

Add references to the following dll files:

Microsoft.Practices.EnterpriseLibrary.Data;
Microsoft.Practices.EnterpriseLibrary.Common;
Microsoft.Practices.EnterpriseLibrary.Configuration;
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.dll
Microsoft.Practices.EnterpriseLibrary.Logging.dll

To download

MS Enterprise Library Page:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnpag2/html/entlib.asp

This site has some helpful EntLib webcasts:
http://www.pnplive.com/

Other References are

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnpag2/html/entlib.asp
http://www.kdkeys.net/forums/4441/ShowPost.aspx
http://msdn.microsoft.com/msdnmag/issues/05/07/DataPoints/default.aspx

Hope it helps!!