.net Framework

.NET Framework

Bijoy SinghalDeveloper Evangelist

Microsoft India

… v3.0, v3.5, v4.0

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

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

Key Areas of the Framework

Data• ADO.NET• ADO.NET Entity Framework• ADO.NET Data Services

Business Logic• Web Services – REST-ful, WS-*, WCF• Work Flows – WF• Management – IIS, Dublin,Oslo

User Interface• Desktop – Silverlight, WPF, XAML, XBAP, ASP.NET, AJAX, WinForms• Mobile – ASP.NET, WinForms

A Look Back…

.NET 1.0 .NET 1.1 .NET 2.0

3.0

3.5

.NET 4

2002 2003 2008 CTP!2005-08

CLR 1.0 CLR 1.1 CLR 2.0 CLR 4

SP1

Additions to the Framework…

CLR

WCF, WPF, WF

LINQ

Velocity, MEF, MAF, MVC

PLINQ, DLR, Velocity, Sync Fr

What Is The .NET Framework?

Base Class Libraries

The CLRJIT & NGEN

Garbage Collector

Security Model

Exception Handling

Loader & Binder

WPF Win Forms DLR ASP.NET WCF And

more!LINQ

Core

Services

.NET Framework 4.0

Base Class Library

Common Language Runtime

Windows Workflow

Foundation

Managed Extensibility Framework

Data ServicesWindows

Communication Foundation

User Interface

Windows Presentation Foundation

ASP.NET(WebForms, MVC,

Dynamic Data)

Data Access

Entity Framework

LINQ

ADO.NET

Parallel Extensions

WinForms LINQ to SQL

LanguagesDynamic Language

Runtime

The goal of CLR 4.0Working Better Together…

Faster…

With Fewer Bugs…

In-Proc SxS

Native/Managed InteropDLR Integration

Managed Extensibility Framework

Threading Parallel Extensions

Garbage Collection Profiling

Code Contracts DebuggingCorrupted State Exceptions

.NET 4.0

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

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

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

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)

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

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 using GCNotifications.

Nothing really prevents your from using GCNotifications on workstations.

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

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

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

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

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.

Feedback / QnA• Your Feedback is Important!

Please take a few moments to fill out our feedback form

Contact• Blog Address

http://blogs.msdn.com/bsinghal

• Email [email protected]

• Bijoy [email protected]

• Abhishek [email protected]

• Rishu [email protected]

• http://delhiitpro.groups.live.com• http://delhidevs.com

© 2006 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the

accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

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