Difference between .Net Framework 2.0 , 3.0 and 3.5


New in .NET framework 2.0

It brings a lot of evolution in class of the framework and refactor control including the support of

Generics
Anonymous methods
Partial class
Nullable type
The new API gives a fine grain control on the behavior of the runtime with regards to multithreading, memory allocation, assembly loading and more
Full 64-bit support for both the x64 and the IA64 hardware platforms
New personalization features for ASP.NET, such as support for themes, skins and webparts.
.NET Micro Framework

New in .NET framework 3.0

Also called WinFX,includes a new set of managed code APIs that are an integral part of Windows Vista and Windows Server 2008 operating systems and provides

Windows Communication Foundation (WCF), formerly called Indigo; a service-oriented messaging system which allows programs to interoperate locally or remotely similar to web services.
Windows Presentation Foundation (WPF), formerly called Avalon; a new user interface subsystem and API based on XML and vector graphics, which uses 3D computer graphics hardware and Direct3D technologies.
Windows Workflow Foundation (WF) allows for building of task automation and integrated transactions using workflows.
Windows CardSpace, formerly called InfoCard; a software component which securely stores a person’s digital identities and provides a unified interface for choosing the identity for a particular transaction, such as logging in to a website

New in .NET framework 3.5

It implement Linq evolution in language. So we have the following evolution in class:

Linq for SQL, XML, Dataset, Object
Addin system
p2p base class
Active directory
ASP.NET Ajax
Anonymous types with static type inference
Paging support for ADO.NET
ADO.NET synchronization API to synchronize local caches and server side datastores
Asynchronous network I/O API
Support for HTTP pipelining and syndication feeds.
New System.CodeDom namespace.

If we take a look into .net Framework 3.0, we clearly see four major break troughs

About Krishana Kumar

Krishana Kumar is SharePoint Architect/Trainer having Architecture experience with high volumes at Enterprise level and global scale - creation of highly scalable solutions with global user base and geographically distributed architectural components. Good knowledge of SharePoint best practices and governance models. I hold Two Master degree in Computer Science with over 11 years of experience working on Microsoft Technologies specially SharePoint, Project, .NET and other Information Worker Technologies. Having good exposer in Client side scripting Angular.js, backbone and Node. I am currently responsible for SharePoint Infrastructure set up and leading teams in various medium and large scale projects, architecting, designing & installing SharePoint farms, developing custom components,, and providing advanced SharePoint administration and development training to teams and customers. I regularly speaks in various SharePoint User Groups and other Events. I have MCSA Windows Azure, MCSA Office 365, MCSE & MCSD SharePoint 2013, Microsoft Certified Developer (MCD) and holds MCPD, MCTIP and MCTS for SharePoint 2010, MCTS MOSS 2007 & WSS 3.0, MCPD, MCITP (EPM 2010 & 2007) and MCSD .NET.
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