The document discusses the .NET framework, including: - It defines .NET as a framework built on open standards for developing and running software applications across platforms. - The core of the .NET framework is the Common Language Runtime (CLR) which manages code compiled for the .NET platform similarly to a Java Virtual Machine. - Applications are compiled into Microsoft Intermediate Language (MSIL) code then the CLR handles just-in-time compilation to native machine code for execution.

1. “.NET FRAMEWORK”

2. Contents
 Target Audience
 Platform & Framework
 What is a Platform?
 Framework Component
 What is .Net?
 .Net Framework Versions
 Core of .Net Framework – CLR
 CLR Main Actors I & II
 How compilation works
 Compilation & Execution
 Types of .Net Applications
 Take Away

3. Target Audience
• System Programmers – One who programs
directly for a given hardware eg. Exetremely
low level output services.
• Application Programmers – One who programs
application used by the people for their
requirement i.e calculator, calendar, excel etc
• .Net is for Applciation programmers not for
System programmers

4. Platform & Framework
• Platform is an environment for developing and
executing application. For eg. Development Env
and Production Env.
• Framework is ready to use collection of Classes
and Interfaces used for developing a particular
type of application.

6. Framework Components
• Microsoft .net Runtime
Used for both Development + Production environment
of .Net Appication
• Microsoft .net Framework SDK
Used mainly for Development environment
• Visula Studio .Net
IDE + RAD for developing and debugging .Net
application
Supports multiple languages like VB, C#, VC++etc
Not needed in Production environment

7. What is .Net?
• Definition: MS.Net is a Framework built on open
internet protocols & standards with tools and
services that meld computing and
communication is new ways.
• Simple Definition: It is an environment for
developing and running software application
can be stand alone window apps or web
services or web applications written in variety
of programming languages + provides inter
language and inter machine interoperability.

8. .Net Framework Version
• V1.0 in Year 2002 (standalone version)
• V1.1 in Year 2003 (standalone version)
• V2.0 in Year 2005 (standalone version)
• V3.0 in Year 2006 (installed over 2.0)
• V3.5 in Year 2008 (installed over 3.0)
• V4.0 in Year 2009
• All versions can be installed side by side on same
machine.

9. Core of .Net Framework
Base Class Libraries + CLR
CLR Manages the code compiled for the .Net
Platform. Its the JVM of Microsoft .Net

10. CLR – Main Actors I
1) CTS (Common Type System)
- Provides every language running on .Net platform a
base set of Data Types
- Everything in CTS is an object
- Most languages implement aliases to those types
- For eg. Int is a 4 byte integer value of CTS type
System.Int32

11. CLR – Main Actors II
2) CLS (Common Language Specification)
The CLS is a set of rules a language compiler must
follow to create a .Net application
CLS defines the following -
- Common variable types (CTS)
- Common visibility like when and where one can see
the variables
- Common method specification and so on

12. How compilation work?
• User writes code in any language i.e VB, C#
• The respective compiler (VBC or CSC) will take
the responsibility of compiling the code into MSIL
• CLR takes the MSIL and pass it to CLR
• CLR allows JIT(Just in Time compiler) runs its
rule and process the MSIL to machine code which
can be understood by OS.
• Note: Machine/Native language totally depends
upon the client machine
configuration/OS/processor/RAM

13. Compilation & Execution

14. Types of .Net Applications

15. Take Away