The document discusses the basics of .NET, including the Common Language Runtime (CLR) which provides a runtime environment for managed code. It also covers the Common Type System (CTS), Common Language Specification (CLS), Base Class Library (BCL), Portable Class Library, Dynamic Language Runtime, Windows Runtime (WinRT), ASP.NET, Windows Store Apps, Desktop Apps, and ADO.NET. The .NET Framework allows development across platforms using common languages and libraries.

1. Basics of .NET
Gowarthini Bhuvaneshraja

2. Basic concept in .NET
 Common Language Runtime (CLR)
 Base Class Library
 Common Type System (CTS)
 Common Language Specification (CLS)
 Portable Class Library
 Dynamic Language Runtime
 WinRT
 ASP.NET
 Windows Store Apps (Metro Style Apps)
 Desktop Apps (Windows Form Applications)
 ADO.NET

3. What is .NET ?
 The .NET Framework is a software framework for developing and
implementing software for personal computer, web etc.
 It was designed and is maintained by Microsoft Corporation.
 It came out around the year 2000, even though Microsoft started
its development in early 90s.
 .NET is a free, cross-platform, open source developer platform for
building many different types of applications.

4. .NET Framework

5. Common Language Runtime (CLR)
 .NET Framework provides runtime environment called Common
Language Runtime (CLR).
 CLR is runtime execution engine of all .NET programs.
 The code which runs under the CLR is called as Managed Code.
 Programmers need not to worry on managing the memory if the
programs are running under the CLR as it provides memory
management and thread management.
 Language Compilers (e.g. C#, VB.Net, J#) will convert the
Code/Program to Microsoft Intermediate Language (MSIL) intern
this will be converted to Native Code by CLR.

6. Common Language Specification (CLS)
CLS performs the following functions:
 Establishes a framework that helps enable cross-language
integration, type safety, and high performance code execution (i.e),
it helps in cross language inheritance and cross language
debugging.
 Provides an object-oriented model that supports the complete
implementation of many programming languages.
 CLR understand all syntactic rule by help of CLS.

7. Common Type System(CTS)
 CTS is deals with the data types.
 It describes set of data types that can be used in different .NET
languages in common.
 The common type system supports two general categories of types:
* Value types
* Reference types
 CLR can understand all language datatype because it follow the
CTS.

8. Base Class Library (BCL)
 BCL is also called FCL (Framework Class Library).
 Base class library is divided into two part that
* Userdefine Class Library
* Predefine Class Library
 Userdefine Class Library is the way you access the Library Classes
and Methods in VB.NET will be the same in C#, and it is common
for all other languages in .NET.
 Developers just need to import the BCL in their language code and
use its predefined methods

9. Portable Class Library
 The Portable Class Library project enables you to write and build
managed assemblies that work on more than one .NET Framework
platform.
 the Portable Class Library (PCL) allows the targeting of a set of
platforms.
 For example WPF is a Windows application, it's a Desktop based
application.
 All these applications run on the .NET framework but a different
environment and platform but they all can easily use the Portable
Class Library.

10. Dynamic Language Runtime
 The dynamic language runtime (DLR) is a runtime environment
that adds a set of services for dynamic languages to the common
language runtime (CLR).
 The DLR makes it easier to develop dynamic languages to run on
the .NET Framework and to add dynamic features to statically typed
languages.
 Dynamic languages can identify the type of an object at run time,
whereas in statically typed languages such as C# and Visual Basic
you must specify object types at design time.

11. WinRt
 Windows Runtime (WinRT) is a platform-agnostic application
architecture first introduced in Windows 8 and Windows Server
2012 in 2012.
 WinRT supports development in C++/WinRT (standard
C++), C++/CX (Component Extensions, a language based
on C++), JavaScriptTypeScript, and the managedcode
languages C# and Visual Basic .NET (VB.NET)
 WinRT components are designed with interoperability between
multiple languages and APIs in mind, including native, managed
and scripting languages.

12. ASP.NET
 ASP.NET is a part of Microsoft .NET platform.
 ASP.NET is an open-source server-side web
application framework designed for web development to produce
dynamic web pages.
 ASP.NET is built on the Common Language Runtime (CLR),
allowing programmers to write ASP.NET code using any supported
.NET language.
 ASP.NET applications are compiled codes, written using the
extensible and reusable components or objects present in
.NET framework.

13. Windows store Apps (Metro Style Apps)
 Metro style apps are designed to leverage special hardware
capabilities and context information to create an experience that is
tailored for the user.
 Metro style apps are full screen apps tailored to your users’ needs,
tailored to the device they run on, tailored for touch interaction, and
tailored to the Windows user interface.
 Windows helps you interact with your users, and your users interact
with your app. R

14. Desktop Apps (Windows Form Apps)
 An application that runs stand-alone in a desktop or laptop
computer.
 The term may be used to contrast desktop applications with
mobile applications that run in smartphones and tablets.
 Examples of some applications: Windows File Explorer (to find
files on your computer) Microsoft Office applications (Word, Excel,
etc.)

15. ADO .NET
 ADO.NET is a set of computer software components that
programmers can use to access data and data services from a
database
 It is a part of the base class library that is included with the
Microsoft .NET Framework.
 It is commonly used by programmers to access and modify data
stored in relational database systems, though it can also access data
in non-relational data sources.

16. Feature of .NET
 Good design.
 OOP- Object Oriented Programming Language
without class we are not create the single application in .NET.
 Language independent.
 Platform independent.
 Flexible data access.
 Web services.
 Code security(CAS).