1. .NET Framework … v3.0, v3.5, v4.0 Bijoy Singhal Developer Evangelist Microsoft India

2. Developer’s Wish List… Easy to translate requirement into code Easy to locate and fix issues Easy manageability and future proofing Easy handling of Data Business Logic User Interface Easy handling of Security Performance Scalability

3. Top considerations of framework design Making Languages more productive Providing APIs for complex patterns Caching Add-ins Concurrency Synchronization Scaffolding Deployment Powerful Tools .NET SDK Tools Visual Studio

4. Key Areas of the Framework

5. A Look Back… SP1 3.5 3.0 .NET 1.0 .NET 1.1 .NET 2.0 .NET 4 2002 2003 2008 CTP! 2005-08 CLR 1.0 CLR 1.1 CLR 2.0 CLR 4

6. Additions to the Framework…

7. What Is The .NET Framework? WPF Win Forms DLR ASP.NET WCF And more! LINQ Base Class Libraries The CLR JIT & NGEN Garbage Collector Security Model Exception Handling Loader & Binder

8. .NET Framework 4.0 User Interface Data Access Services Windows Presentation Foundation ASP.NET (WebForms, MVC, Dynamic Data) Entity Framework ADO.NET Data Services Windows Communication Foundation WinForms LINQ to SQL Windows Workflow Foundation Core Base Class Library Dynamic Language Runtime Languages Managed Extensibility Framework LINQ Parallel Extensions Common Language Runtime

9. The goal of CLR 4.0 Working Better Together… Faster… With Fewer Bugs… In-Proc SxS Managed Extensibility Framework Native/Managed Interop DLR Integration Threading Parallel Extensions Garbage Collection Profiling Code Contracts Debugging Corrupted State Exceptions

10. .NET 4.0 http://brad_abrams.members.winisp.net/Projects/PDC2008/DotNet4Poster/DotNetFramework4PosterDeepZoom.htm

11. Parallel Computing Task Parallel Library (TPL) Imperative Task Parallelism Work-Stealing Algorithm for maximum efficiency Higher-level abstraction (no more Thread knowledge necessary) Parallel Linq (PLINQ) Declarative Data Parallelism (focus on the *what*, not the *how*) Simple Parallelism via Linq-To-Objects Coordination Data Structures (CDS) Common structures to help with parallelism tasks

12. Managed Extensibility Framework - Summary System.ComponentModel.Composition MEF Core Components: Catalog Discovers and maintain extensions CompositionContainer Coordinate creations and satisfy dependencies ComposablePart Offer one or more exports May depend on imports for extension it uses Create reusable components Easy declaration/consumption of extensibility points Watching a specific directory for new extensions No need to create infrastructure from scratch MEF is dynamically composed

13. Code Contracts - Summary Foundation Design by contract Based on MSR’s SPEC# What does it bring? Improved testability Static verification API Documentation How does it help? Guarantee obligations on entry (parameter validations) Guarantee property at exit (return value range) Maintain property during execution (object invariance)

14. Garbage Collection - Summary Server Garbage Collection Algorithm maximizes overall throughput – fast – but all managed code has to be paused while it runs. In CLR 4.0, you can be notified before a Gen 2/ Large Object Heap collection. Useful when you can do load balancing. Workstation Garbage Collection CLR 2.0: Can do most, but not all, of a Generation 2 collection without pausing managed code New allocations go on ephemeral segment But can’t do Gen0 and Gen1 at same time as Gen2. New in CLR 4.0, we have Background Collection Background Collection can do a Gen0 or Gen1 while doing Gen2 Only unusual circumstances now lead to long latency

15. Garbage Collection - Summary Definite improvement in performance and scalability of the application Lesser chance of getting OutOfMemoryException Application health is optimum at all times. Optimum consumption of the processing power. On the server side you can load balance your application usingGCNotifications. Nothing really prevents your from using GCNotifications on workstations.

16. Dynamic Language Support Dynamic keyword: mark a property or variable as dynamic at compile time. at runtime the corresponding static type will be assigned to that entity. Dynamic Language Runtime Interoperate and interact with the CLR using dynamic languages Get the power of .NET for dynamic languages

17. Dynamic in .NET 4.0 - Summary Dynamic Language Runtime Added dynamism to .NET Added runtime type checking Full support for IronRuby, IronPython Dynamic Dispatch Introduced new type – dynamic Compiler merely packages information and defers binding to runtime Uses IDispatch interface Create your own dynamic types using: DynamicObject or IDynamicMetaObjectProvider

18. ASP.NET 4.0 ASP.NET MVC Separation of Concerns, Testability High control over market up ASP.NET Dynamic Data support for MVC Easily Create Custom controls and views based on data base ASP.NET better CSS and ID

19. More Web Goodies… ADO.NET Data Services REST based exposure of relational data Ability to go “offline” ASP.NET AJAX JavaScript UI Templates and Data-binding AJAX Control Toolkit Enhancements Client-side controls DOM selection, manipulation and animation Addition of jQuery

20. Some other interesting Enhancements CLR Enhancement Side by Side In Process runtime (CLR) Use ClrVer to see more. BCL Enhancements BigInteger Arbitrary length integer supporting all mathematical operations. Tuples Sequence of finite length System.Lazy<T> Framework implements the pattern; Developer uses it.

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22. Contact Blog Address http://blogs.msdn.com/bsinghal Email Address bsinghal@microsoft.com

23. Bijoy Singhal bsinghal@microsoft.com Abhishek Baxi abby@baxiabhishek.info Rishu Mehra rishumehra@merawindows.com http://delhiitpro.groups.live.com http://delhidevs.com