PostSharp Features

General

• Full Support of .NET 2.0, 3.0 and 3.5 for purely managed assemblies (C#, VB.NET, J#, ...).
• Produces Plain and Verifiable .NET Assembly that will be compatible with most tools of your ecosystem!
• Seamless Integration with Visual Studio and MSBuild.
• Extensive Debugging Experience: debugging simply works as usually, and you can step into aspect handlers.
• Highest Quality of API design and implementation, tested and praised by a large community.

PostSharp Laos

• Pay-As-You-Use Complexity: we have kept simple things simple.
• Large Choice of Aspects including method enhancement, method call interception, field-level aspects, and type composition.

  Aspect Type	Available Handlers	Typical Use Case
  Around Method	On Exit, On Entry, On Success, On Exception	Instrumentation; Exception Handling; Transactions; Security
  Method Interception	On Invocation	Cache; Instrumentation of External Method
  Method Implementation	On Invocation	Automatic implementation of external or abstract methods.
  Field Access	On Get Value, On Set Value	Field-Level Security; Validation; Class Persistence; In-Memory Transactions
  Interface Composition	Get Interface Implementation	Mix-In, Multiple Inheritance by Composition
  Compound Aspect	Get Aspects	Complex Aspects

• Easily build Libraries of Aspects and reuse them between different projects.
• Object-Oriented Aspects: aspects are plain .NET classes with full support for inheritance and abstract or virtual methods.
• Declarative and Imperative Validation of aspect usage at compile time: make sure that your custom attribute is only used where it makes sense.
• Compile-Time Initialization of aspects: don't compute at run-time what can be done at compile-time.

PostSharp Core

PostSharp Core is a true compiler back-end, and is actually much more than that. Besides offering an exhaustive object model of .NET assemblies, it provides the architecture that runs complex task-based and plug-in-enabled projects on assemblies.

• Comprehensive Object Model representing all features of managed .NET assemblies. (only purely managed assemblies are supported)
• Low-Level Aspect Weaver abstracting the complex process of MSIL instruction injection for high-level aspect weavers as PostSharp Laos.
• Extensible Platform Infrastructure managing the whole assembly transformation process as a set of tasks and let you package your custom tasks as a plug-in. Yes, Laos is 'only' a plug-in of PostSharp Core.