This site gives the introduction of .NET framework.

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Department of Information Technology
CE308.01: ADVANCED
PROGRAMMING USING .NET
FRAMEWORK

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Credits and Hours:
Teaching
Scheme
Theory Practical Total Credit
Hours/week 2 4 6
4
Marks 100 100 200

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Department of Information Technology
Course Outline
Sr
No.
Title of the unit
1 Introduction to .NET framework
2 C# - The Basics, Console Applications in C#
3 C# .NET
4 ADO.NET
5 Windows Forms and Controls in detail
6 Visual Inheritance in C#.NET
7 Mastering Windows Forms
8 ASP.NET
9 Themes and Master Pages

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Course Outline
Sr
No.
Title of the unit
10 Managing State
11 Creating and Consuming Web Services
12 Advanced in .NET

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Preferred Material
 Text Books:
 Christian Nagel, Professional C# .Net, Wrox
Publication
 Matthew Macdonald and Robert Standefer,
ASP.NET Complete Reference, TMH
 Reference book:
 Vijay Mukhi, C# The Basics, BPB Publications

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.NET Framework
 What is .NET?
 Language?
 Technology?
 .NET Framework
 .NET Framework is an environment/platform
on which you can develop any application.

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What is .NET Framework?
.NET
Application
Operating
System
.NET
Framework

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History of Dot Net
 Microsoft put their best men at work for a secret
project called Next Generation Windows Services
(NGWS)., under the direct supervision of Mr. Bill
Gates.
 Sometime in the July 2000, Microsoft announced a
whole new software development framework for
Windows called .NET in the Professional Developer
Conference (PDC).
 Microsoft also released PDC version of the software for
the developers to test.
 After initial testing and feedback Beta 1 of .NET was
announced.
 Microsoft then announced Beta 2 after it incorporated
many changes suggested by the community into the
software.
 Finally, in March 2002 Microsoft released final version
of the .NET framework.

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Features of .NET Framework
 Pure object oriented programming
 Inheritance, Polymorphism, Fun. &
Operator Overloading etc.
 Platform Independent
 Multiple Language Supports
 C#,VB.NET,F#,J#, etc.
 Rich set of Class Library
 FCL (Framework Base Class Library)
 Language Interoperability
 CLS, CTS

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Features of .NET Framework
 Efficient Data Access
 ADO.NET
 Security
 Scalability
 Automatic memory management
 Garbage Collection

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Architecture of .NET framework

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Framework Base Class Library
 Framework – you can call it and it can
call you
 Large class library
 Over 2500 classes
 Major components
 Networking, security, I/O, files, etc.
 Data and XML Classes
 Web Services/UI
 Windows UI

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Common Language Runtime(CLR)
 Central to the .NET Framework is its
runtime execution environment
 Compilation occurs in two steps in .NET
 Compilation of source code to Microsoft
Intermediate Language (IL).
 2. Compilation of IL to platform-specific
code by the CLR

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Common Language Runtime(CLR)

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Common Type System (CTS)
 Types are the mechanism by which code
written in one programming language
can talk to code written in a different
programming language
 Because types are at the root of the
CLR, Microsoft created a formal
specification – the common type system
(CTS)—that describes how types are
defined and behave

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Common Language Specification
 Language integration is a fantastic goal,
of course, but the truth of the matter is
that programming languages are very
different from one another
 For Example
 case-sensitivity
 unsigned integers
 operator overloading
 methods that support a variable number
of parameters

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Common Language Specification
 then it is important that you use only
features of your programming language
that are guaranteed to be available in all
other languages
 To help you with this, Microsoft has
defined a common language
specification (CLS) that details for
compiler vendors the minimum set of
features that their compilers must
support if they are to target the runtime

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Common Language Specification

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Managed Code
 Managed code is code running under the
control of the CLR.
 Managed code is compiled to IL, and
then JITted into native code.
 Managed code uses data managed by
the Garbage Collector.
 Managed code includes meta-data.
 Code that is not running under the
control of CLR is unmanaged code
 Example:Pointer in C++;

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Garbage Collector
 The purpose of this program is to clean
up memory automatically
 Objects are allocated on the Garbage
collected heap
 The garbage collector is responsible for
reclaiming memory used by objects
which are no longer in use.

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Namespaces
 Suppose you are team leader and 10
developers are working in team.
 For One project you ask your 10
developer to create 10 classes
individually.
 Your task is to combine all these 100
class into one module.
 How many chances are that your
developer will not take same class
name???

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Namespace
 To avoid conflict in class name we are
using namespace.
 Instead create classes ask them to
create all the classes in namespace.

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Assembly
 An assembly is the .NET term for a
deployment and configuration unit.
 It is a logical unit of MSIL, Meta data,
resource etc.
 Two Types;
 Private Assembly
 Private to user application only
 Example: exe/dll file of application
 Shared Assembly
 Sheared by one or more programs
 Example:mscorlib.dll

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Assembly Versioning

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DLL HELL
 "DLL Hell" refers to the set of problems
caused when multiple applications
attempt to share a common component
like a dynamic link library (DLL) or a
Component Object Model (COM) class
 DLL Hell problem is solved in .NET with
the introduction of Assembly versioning.
It allows the application to specify not
only the library it needs to run, but also
the version of the assembly.

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.NET Interoperability
 Why Interoperability?
 The .NET platform is new
 The Win32 platform is well
established
 No one wants to start from scratch
 Use of existing code in .NET
applications is essential
 Interoperability goes both ways

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COM (Component Object Model)
• COM is dead!!!
• COM code equals legacy code
• If you don’t know COM, don’t start
learning it now
• Er, ....
• That’s not practical
• There is a massive investment in COM
that we still need to use

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General Points
• COM ↔ .NET Interoperability is usually
called Com Interop
• COM/Win32 ↔ .NET requires
marshaling of parameters
• COM Interop requires some
reconciliation of COM reference
counting and .NET GC mechanisms
• Interoperability requires some proxy /
wrapper to be in place (automated)