.NET is a software development platform that allows developers to create web and windows applications using any compliant .NET language like C#, VB.NET, and C++. The .NET Framework includes a common language runtime (CLR) that compiles code to an intermediate language (IL) and handles execution, memory management, and security. It also includes libraries and APIs for tasks like web development, data access, and user interfaces. Visual Studio.NET is an integrated development environment (IDE) that supports building .NET applications.

1. Introduction
to
.NET
Framework
Saurabh Kachhia
MCA 2nd Sem

2. What Is .NET
 Software platform
 In other words:
.NET is not a language (Runtime and a
library for writing and executing
written programs in any compliant
language)
 .NET is a new framework for developing
web-based and windows-based
applications within the Microsoft
environment.

3. What Is .NET
.NET Application
.NET Framework
Operating System + Hardware

4. Framework, Languages, And Tools
VB C++ C# JScript …
Common Language Specification
Visual Studio.NET
Web User
Services Interface
Data and XML
Base Class Library
Common Language Runtime

5. .NET Framework
Services
 Common Language Runtime
 Windows® Forms
 ASP.NET
◦ Web Forms
◦ Web Services
 ADO.NET, evolution of ADO
 Visual Studio.NET

6. Common Language
Runtime (CLR)
•CLR works like a virtual machine in
executing all languages.
•All .NET languages must obey the
rules and standards imposed by CLR.
Examples:
– Object declaration, creation and use
– Data types, language libraries
– Error and exception handling

7. Compilation in .NET
Code in another
Code in VB.NET Code in C#
.NET Language
Appropriate
VB.NET compiler C# compiler
Compiler
IL(Intermediate
Language) code
CLR just-in-time
execution

8. Intermediate Language
(MSIL)
• .NET languages are not compiled to
machine code. They are compiled to
an Intermediate Language (IL).
• CLR accepts the IL code and
recompiles it to machine code. The
recompilation is just-in-time (JIT)
meaning it is done as soon as a
function or subroutine is called.

9. Languages
• Languages provided by MS
– VB, C++, C#, J#, Jscript
• Third-parties are building
– APL, COBOL, Pascal, Eiffel, Has
kell, ML, Oberon, Perl, Python,
Scheme, Smalltalk…

10. ASP.NET
•The platform services that allow to
program Web Applications and Web
Services in any .NET language
•ASP.NET Uses .NET languages to
generate HTML pages. HTML page is
targeted to the capabilities of the
requesting Browser

11. Visual
Studio.NET
• Development tool that contains a rich
set of productivity and debugging
features
• Single IDE for building an
application