1.
Sandun Angelo Perera
Geveo Australasia
18th November, 2009

2.
 Cool UI
 Multi monitor support
 Code optimized IDE
 Framework and DLR
 Parallel programming
 Code pecker’s interest
 What’s new in C# 4.0
 UML support
 Help system
 Performance
 ASP.net 4.0

3.
Beta 1
Beta 2

4.
Common Language Runtime
Statically-Typed
C#
VB
Ruby
Python
Dynamically-Typed
Common Language Runtime
Statically-Typed
C#
VB
Ruby
Python
Dynamically-Typed
Dynamic Language Runtime

5.
Framework and
Application Modules
Asynchronous Agents
Library
Optimize the
asynchronous executions
Parallel Pattern Library
Support parallel
computing of
resourcesSchedule tasks
at runtime Manage computing
resources

6.
v2.0

7.
 A Functional Programming Language derived
from OCaml and the ML(meta language) family
of languages
 Very good for compute-intensive problems,
highly parallel problems, and language-oriented
programming
http://channel9.msdn.com/tags/Erik+Meijer/

8.
static void Main(string[] args)
{
Console.WriteLine(“Hello Geveo!”);
Console.ReadLine();
}

9.
Snippets support available
for Code behind, HTML
and JavaScript

10.
 Ctrl + Wheel for Zoom In/Out

11.
C# 1.0
C# 2.0
C# 3.0
Managed Code
Generics
LINQ
C# 4.0
Dynamic

12.
VB1 – VB3
VB4 – VB6
VB7 – VB9
Windows
programming
made easy
Components
made easy
Power and
simplicity
for .NET
VB10
Continuing
the trend

13.
 Late binding support
 Optional parameters and named parameters
 Improved COM Interop
 Covariance and Contravariance

14.
 The dynamic type is just a regular type. It tells the
compiler that everything to do with that object or
expression should be done dynamically. (≈var)

15.
 Optional parameter has a default value as part of
its definition.
 If argument not passed for optional parameter
then the default value will be used.
 Optional parameters must be declared after all
the normal parameters.

16.
This example demonstrate how
delegates can be used with methods
that have return types that are derived
from the return type in the delegate
signature. The data type returned by
SecondHandler is of type Dog, which
derived from the Mammals type that is
defined in the delegate.
Covariance permits a method to have a
more derived return type than what is
defined in the delegate.

17.
Now you can create an event handler that accepts an EventArgs input parameter and
use it with the Button.MouseClick event that sends a MouseEventArgs type as a
parameter, and also with TextBox.KeyDown event that sends a KeyEventArgs
parameter.

18.
 Generate From Usage
› The Generate From Usage feature enables you to use classes and
members before you define them. Without leaving your current
location in code, you can generate a stub for a class, constructor,
method, property, field, or enum that you want to use but have not
yet defined. This minimizes interruption to your workflow.

19.
F1

20.
Improved
performance by
asynchronous
loading of COM tab
Also the Garbage
Collector’s performance has
increased, this also affected
by the concurrency
architecture which use
parallelism

21.
 More control over ViewState
 Enhanced web standards and accessibility
 Support for new browsers & devices
(Chrome/Blackberry/SmartPhone)
 Way to define browser capabilities
 ClientIDMode for scripting (AutoID/Static/Predictable)
 PersistedSelection row selection for data controls
(came with DynamicData in 3.5SP1)
 URL routing

22.
 FormView / ListView controls enhancement
 Validation controls enhancement
 Enhanced support for web standards and
accessibility
 Promotion for CSS (Update / UpdateProgress panels)
 QueryExtender control for filter data
 Backward compatibility in control rendering
New

23.
The new .NET 4 machine.config file now already
registered all of the ASP.NET tag sections, handlers
and modules that we’ve added over the years,
including the functionality for:
 ASP.NET AJAX
 ASP.NET Dynamic Data
 ASP.NET Routing (which can now be used for both ASP.NET
WebForms and ASP.NET MVC)
 ASP.NET Chart Control (which now built-into ASP.NET V4)

24.
 Introduced with ASP.NET 3.5 SP1
 With ASP.NET 4.0, URLs like above can now be
mapped to both ASP.NET MVC Controller classes,
as well as ASP.NET Web Forms based pages.
http://www.mysite.com/products.aspx?category=software
http://www.mysite.com/products/software
What is URL routing ?

25.
The first parameter provides a friendly name for the route, and the second
specifies the URL format to match. The third parameter, though, points to a
Products.aspx page to handle the URL instead of a controller class. You can
optionally specify additional parameters to MapPageRoute() that take advantage
of features like “route constraints” and provide “default values for parameters”
just like you can with ASP.NET MVC based route registrations.

26.
Within the Products.aspx page you can then write code like below that uses the
new Page.RouteData property in ASP.NET 4.0 to retrieve the “category”
parameter value mapped using the /products/{category} URL filter, and then
databind the category products to display them:
Retrieving URL in code behind

27.
 Old Redirect() method will temporary redirect, so
has round trips when accessing previous URL’s
 New RedirectPermanent() method will make the
redirection permanent.

28.
 Not for InProc mode
 Using GZipStream
 Serialized communication

29.
 Starter project templates
 Searching and navigation in code
 Code contracts
 New data types
 Thread Analysis
 Auto-Start ASP.net application
 WPF 4.0
 AJAX 4.0
 DynamicData
 Windows development
 Deployment

30.
http://SandunAngelo.blogspot.com/

31.
 MSDN
› http://msdn.microsoft.com/en-us/library/bb386063%28VS.100%29.aspx
 Channel9
› http://channel9.msdn.com/tags/.NET+Framework+4.0/
 Blogs
› http://weblogs.asp.net/scottgu/archive/2009/08/25/vs-2010-and-net-4-
series.aspx
› http://geekswithblogs.net/sdorman/archive/2008/11/16/c-4.0-dynamic-
programming.aspx
› http://blogs.msdn.com/samng/archive/2008/10/29/dynamic-in-c.aspx