.NET FRAMEWORK

.NET FRAMEWOK

It is a software which can be installed in Microsoft’s Windows OS running computer systems.This provides a large range of features including user interface, data and data access,database connectivity, cryptography, web application development, numeric algorithms, andnetwork communications. This class library is used by programmers. The programmers combine it with their own code to produce applications.

Principal design features

· Interoperability

The .NET Framework provides means to access functionality that is implemented in programs that execute outside the .NET environment. Access to COM components is provided in the System. InteropServices and System.EnterpriseServices namespaces of the framework; access to other functionality is provided using the P/Invoke feature.

· Common Runtime Engine

The Common Language Runtime (CLR) is the virtual machine component of the .NET framework. All .NET programs execute under the supervision of the CLR. It guaranteed certain properties and behaviors in the areas of memory management, security, and exception handling.

· Language Independence

The .NET Framework introduces a Common Type System, or CTS. The CTSspecification defines all possible data types and programming constructs supported by the CLR and how they may or may not interact with each other. Because of this feature, the .NET Framework supports the exchange of instances of types between programs written in any of the .NET languages.

· Base Class Library

The Base Class Library (BCL), part of the Framework Class Library (FCL), is a library of functionality available to all languages using the .NET Framework. This provides classes which encapsulate a number of common functions, including file reading and writing, graphic rendering, database interaction and XML document manipulation.

· Simplified Deployment

The .NET framework includes design features and tools that help manage theinstallation of computer software to ensure that it does not interfere with previously installed software, and that it conforms to security requirements.

· Security

The design is meant to address some of the vulnerabilities, such as buffer overflows, that have been exploited by malicious software. Additionally, .NET provides a common security model for all applications.

· Portability

A program written to use the framework should run without change on any type of system for which the framework is implemented. This makes it possible for third parties to create compatible implementations of the framework and its languages on other platforms.

.NET Framework is made up of the Common Language Runtime (CLR), the Base Class Library (SystemClasses). It allows us to build our own services (Web Services or Windows Services) and web Applications (Web forms Or Asp .Net), and Windows applications (Windows forms).

The above picture demonstrates how the .NET languages follow rules provided by the Common Language Specifications (CLS). Every component of the .NET Framework can take advantage of the large pre- built library of classes called the Framework Class Library (FCL). Once everything is put together, the code that is created is executed in the Common Language Runtime. CLR is designed to allow any .NET-compliant language to execute its code. At the time of writing, these languages included VB .Net, C# and C++ .NET, but any language can become .NET- compliant, if they follow CLS rules.