1. .NET Framework Design Goals
Dramatically simplifies development and deployment
Unifies programming models
Provides robust and secure execution environment
Supports multiple programming languages

2. Framework, Languages, And Tools
Operating System
Common Language Runtime
Base Class Library
ADO.NET and XML
ASP.NET
Web Forms Web Services
Mobile Internet Toolkit
Windows
Forms
Common Language Specification VB
C++ C#
JScript J#
Visual Studio.NET

3. demo
One Lap Around .NET

4. Demo: One Lap Around .NET
Create a simple Web Service
Test it in Internet Explorer
Add data logic to it
Build a smart client for it
Show seamless and safe deployment of the smart client

5. Code and data structures
The .NET Evolution
Application
Code and data structures
Before COM, applications were completely separate entities with little or no integration

6. The .NET Evolution
COM provides a way for components to integrate; However, each component must provide the “plumbing” and objects cannot directly interact

7. The .NET Evolution
With the .NET Framework common language runtime, components are built on a common substrate; No “plumbing” is needed and objects can directly interact

8. Compilation And Execution
Assembly
Code (IL)
Source Code
Language Compiler
Metadata
Execution
JIT Compiler
Native
Code
At installation or the first time each method is called

9. Simplify Development Common Type System Enables clean OO programming
Common instance and type definition
Enables clean OO programming
Classes and interfaces
Constructors, properties, methods, events
Cross language inheritance
Built-in interoperability
With COM
With native (Win32® style) DLLs

10. Everything Is An Object
Traditional views of primitive types
C++, Java™: They’re “magic”
Smalltalk, Lisp: They’re full-blown objects
.NET Framework solution: Value types
unifies with no performance cost
Deep simplicity throughout system
Improved extensibility and reusability
New primitive types: Decimal, SQL…
Collections, etc., work for all types

11. Everything Is An Object
Boxing
Allocates box, copies value into it
Unboxing
Checks type of box, copies value out
int i = 123;
object o = i;
int j = (int)o;
Dim i As Integer = 123
Dim o As Object = i
Dim j As Integer = CInt(o)
123 i o
System.Int32 j

12. Robust Environment Automatic lifetime management Exception handling
All objects are garbage collected
Exception handling
Error handling first class and mandatory
Type-safety
No buffer overruns, No unsafe casts, Uninitialized variables

13. Secure Environment Security designed-in
Code access security enforcement
Security based on the identity of code
Administratively configurable via policy
ASP.NET integrated authentication of user
Windows identity, Passport®, forms-based, …
Cryptography library with XML DSIG support
Digital signature for XML (

14. Simplify Deployment And Management
Zero-impact install
Applications and components can be shared or private
Side-by-side execution
Multiple versions of the same component can co-exist on a system
Assemblies
Contain dependency information

15. Unify Programming Models
.NET Framework
Consistent API availability regardless of
language and programming model
VB Forms
RAD,
Composition,
Delegation
MFC/ATL
Subclassing,
Power,
Expressiveness
ASP
Stateless,
Code embedded
in HTML pages
Windows API

16. How Much Simpler? Windows API .NET Framework
HWND hwndMain = CreateWindowEx(
0, "MainWClass", "Main Window",
WS_OVERLAPPEDWINDOW | WS_HSCROLL | WS_VSCROLL,
CW_USEDEFAULT, CW_USEDEFAULT,
(HWND)NULL, (HMENU)NULL, hInstance, NULL);
ShowWindow(hwndMain, SW_SHOWDEFAULT);
UpdateWindow(hwndMain);
.NET Framework
Dim form As New Form()
form.Text = "Main Window"
form.Show()

17. Factored And Extensible
The Framework is not a “black box”
Any .NET class is available for you to extend through inheritance
Gives developers much more head room
Plug and Play components and subsystems

18. The .NET Framework Library
Web Forms Web Services
Mobile Internet Toolkit
Windows
Forms
ASP.NET
ADO.NET and XML
Base Class Library

19. The .NET Framework Library
System
System.Data
System.Xml
System.Web
Globalization
Diagnostics
Configuration
Collections
Resources
Reflection
Net IO
Threading
Text
ServiceProcess
Security
Common
OleDb
SQLTypes
SqlClient
XPath
XSLT
Runtime
InteropServices
Remoting
Serialization
SessionState
Caching
Services
Description
Discovery
Protocols UI
HtmlControls
WebControls
System.Drawing
Imaging
Drawing2D
Printing
System.Windows.Forms
Design
ComponentModel

20. Base Framework System Collections Security Configuration
ServiceProcess
Diagnostics
Text
Globalization
Threading IO
Runtime
InteropServices
Net
Remoting
Reflection
Serialization
Resources

21. Data And XML System.Data OleDb SQLClient Common SQLTypes System.Xml
XSLT
Serialization
XPath

22. ASP.NET System.Web Services UI Description HtmlControls Discovery
WebControls
Protocols
Caching
Security
Configuration
SessionState

23. Windows® Forms System.Windows.Forms Design ComponentModel
System.Drawing
Drawing2D
Printing
Imaging
Text

24. Standardization
A subset of the .NET Framework and C# submitted to ECMA
Adopted as International standards in Dec. 2001
In the ISO fast-track process now
Co-sponsored with Intel, Hewlett-Packard
Common language infrastructure
Based on common language runtime and base framework
Layered into increasing levels of functionality