What is different between .net framework 2.0 and 3.0 and 3.5?

NET framework 2.0

NET framework 3.0

NET framework 3.5

-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

- 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

- It implement Linq evolution in language. So we have the folowing 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.