EntlibAOP provides various features of Microsoft Enterprise library in a declarative fashion. EntlibAOP uses PostSharp to wrap various features and provide then as .NET atributes.

Currently EntlibAOP provides the following feature:

• Tracing
• Exception Handling
• Caching
• Encryption

Apart from providing these Enterprise Library features EntlibAOP also provides some enhancements like:

• Batch Logging - Log messages can be queued before writting into the sink which improves the performance
• Smart Caching - Cache return value or a method based on the parameter values provided to a method

To know more about:
Microsoft Enterprise Library : http://www.codeplex.com/entlib
PostSharp : http://www.postsharp.org