• A new platform for building Internet applications and Webservices
• Contains runtime, messaging, services, data access,interoperability, HTTP services, ASP+, and more
• Supports multi-language development Has a rich set of internet-supporting technologies
• A common class library with a standard set of classes whichall inherits from a base class called Object

• Data access
• Functionality of the Win 32 API that is accessible through a
• simple object model
• The VB language has been upgraded
• C#
• Memory management
• ASP.NET
• Programming languages have been moved closer together
• Assembly
• the Common Language Runtime (for support of other programming languages)
• A collection of components that provide support for networking, security, and other "base" services commonly needed in distributed applications
• Windows Forms (WinForms) and Web Forms, rich Windows user interface components
• ASP.NET, a new version of Active Server Pages
• ADO.NET, new data access objects in the tradition of the original Active Data Objects
• XML Suuports
  

C# , C++ ,VB, JScript,Standard ML, SmallTalk, Scheme, Python, APL, Cobol, ComponentPascal,Eiffel , Haskell, Mercury , Oberon,Perl....