The document discusses cross-cutting concerns in software development, focusing on aspect-oriented programming and its applications in .NET environments such as ASP.NET MVC. It highlights important concepts such as logging, validation, error handling, and code weaving with references to AspectJ and PostSharp. Additionally, it introduces mixins as a powerful design pattern and concludes with key take-aways.

1. Cross cutting concerns
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2. Concerns

3. Cross cutting concerns

4. Logging

5. Validation

6. Error handling

7. Aspect oriented programming

8. Code weaving

9. Mixins

10. The ASP.NET MVC way

11. Reference
AspectJ (where it all started)
Postsharp (code weaving for .Net)
Mixins (Really powerful pattern)

12. Take-aways