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ASP.NET 4 Hosting - ASPHostPortal :: Practical ASP.NET - Cool New Features in ASP.NET 4

clock May 26, 2010 06:51 by author Jervis

This topic contains brief information about ASP.NET 4. If you looking for ASP.NET 4 hosting, you can always consider ASPHostPortal. At ASPHostPortal you can get a professional Visual basic installation with your Visual basic Hosting account. You can always start from our Portal ONE hosting plan (from @$5.00/month) to get this application installed on your website. So, why wait longer?

Compacting out-of-Process Session Data

We
like using the Session object (We like the Cache object even better). Many developers object to the Session object because it imposes a footprint on the server even when a user isn't requesting a page. In ASP.NET 4 the sessionState tag in the web.config file now has a new attribute called compressionEnabled that causes serialized to data to be automatically compressed. Here's what it looks like:

<sessionState
         compressionEnabled=”true”. . .

Session data is only serialized if you're using a state server (where mode is set to "StateServer") or a database (mode="SqlServer"). But in those scenarios, this option will lower the impact of the user's footprint when storing data in the Session object -- provided you're willing to spend the CPU cycles to compact and un-compact your data.

Permanently Redirecting a Page

It would be wonderful if we never changed the URLs for our pages. However, in the real world that doesn't happen. Pages move around. Rather than let users get 404 errors when requesting a page using a URL that's worked in the past, ASP.NET programmers often put a Response.Redirect in the Page Load of the old page and have that Redirect send the user to the new location of the page.

In ASP.NET 4, you can now use the Response.RedirectPermanent method in the same way. RedirectPermanent issues HTTP 301 messages which signal to the client that this is a permanent redirection. Provided the client recognizes 301 messages, the client will automatically substitute the new URL for the old URL whenever the user requests the old URL, skipping the trip to the old location.

Alternatively, you could use Routing, which eliminates this problem. Implementing routing is much simpler in ASP.NET 4 and I'll cover that topic in a later column.

Control-Level Changes

Probably the most important change to existing controls is invisible: Many controls will be generating different HTML in ASP.NET 4. Partially this is a move to produce HTML that is more complaint with XHTML 4.0; partially it is an effort to produce HTML that CSS authors (i.e. not me) will find easier to style. Overall, there's a sharp reduction in the number of table tags being produced. However, if you have code that's dependent on the old HTML format, you can add this element to your config file to keep the old HTML:

<pages controlRenderingCompatibilityVersion=”3.5”/>

In the past, if you wanted to reduce the size of a page's ViewState, you considered setting the EnableViewState property on the Page to False. However, that disabled ViewState for all the controls on the page, and usually there were some controls that needed the ViewState. The alternative was to disable ViewState on each control where you didn't need it -- typically most of the controls on the page. Now in ASP.NET 4, you can disable ViewState for the Page and set EnableViewStateMode to Enabled on the controls where you actually need ViewState.

Reasons why you must trust ASPHostPortal.com

Every provider will tell you how they treat their support, uptime, expertise, guarantees, etc., are. Take a close look. What they're really offering you is nothing close to what ASPHostPortal does. You will be treated with respect and provided the courtesy and service you would expect from a world-class web hosting business.

You’ll have highly trained, skilled professional technical support people ready, willing, and wanting to help you 24 hours a day. Your web hosting account servers are monitored from three monitoring points, with two alert points, every minute, 24 hours a day, 7 days a week, 365 days a year. The followings are the list of other added- benefits you can find when hosting with us:

- DELL Hardware
Dell hardware is engineered to keep critical enterprise applications running around the clock with clustered solutions fully tested and certified by Dell and other leading operating system and application providers.
- Recovery Systems
Recovery becomes easy and seamless with our fully managed backup services. We monitor your server to ensure your data is properly backed up and recoverable so when the time comes, you can easily repair or recover your data.
- Control Panel
We provide one of the most comprehensive customer control panels available. Providing maximum control and ease of use, our Control Panel serves as the central management point for your ASPHostPortal account. You’ll use a flexible, powerful hosting control panel that will give you direct control over your web hosting account. Our control panel and systems configuration is fully automated and this means your settings are configured automatically and instantly.
- Excellent Expertise in Technology
The reason we can provide you with a great amount of power, flexibility, and simplicity at such a discounted price is due to incredible efficiencies within our business. We have not just been providing hosting for many clients for years, we have also been researching, developing, and innovating every aspect of our operations, systems, procedures, strategy, management, and teams. Our operations are based on a continual improvement program where we review thousands of systems, operational and management metrics in real-time, to fine-tune every aspect of our operation and activities. We continually train and retrain all people in our teams. We provide all people in our teams with the time, space, and inspiration to research, understand, and explore the Internet in search of greater knowledge. We do this while providing you with the best hosting services for the lowest possible price.
- Data Center
ASPHostPortal modular Tier-3 data center was specifically designed to be a world-class web hosting facility totally dedicated to uncompromised performance and security
- Monitoring Services
From the moment your server is connected to our network it is monitored for connectivity, disk, memory and CPU utilization - as well as hardware failures. Our engineers are alerted to potential issues before they become critical.
- Network
ASPHostPortal has architected its network like no other hosting company. Every facet of our network infrastructure scales to gigabit speeds with no single point of failure.
- Security
Network security and the security of your server are ASPHostPortal's top priorities. Our security team is constantly monitoring the entire network for unusual or suspicious behavior so that when it is detected we can address the issue before our network or your server is affected.
- Support Services
Engineers staff our data center 24 hours a day, 7 days a week, 365 days a year to manage the network infrastructure and oversee top-of-the-line servers that host our clients' critical sites and services.

 



ASP.NET 4 Hosting - ASPHostPortal :: ASP.NET 4 SEO Improvements (VS 2010 and .NET 4.0 Series)

clock May 25, 2010 10:01 by author Jervis

At ASPHostPortal you can get a professional Visual basic installation with your ASP.NET 4 Hosting account. You can always start from our Portal ONE hosting plan (from @$5.00/month) to get this application installed on your website. So, why wait longer?

Why SEO?

Search engine optimization (SEO) is important for any publically facing web-site.  A large percentage of traffic to sites now comes from search engines, and improving the search relevancy of your site will lead to more user traffic to your site from search engine queries (which can directly or indirectly increase the revenue you make through your site).

Measuring the SEO of your website with the SEO Toolkit

We blogged about the free SEO Toolkit we’ve shipped that you can use to analyze your site for SEO correctness, and which provides detailed suggestions on any SEO issues it finds. 

We highly recommend downloading and using the tool against any public site you work on.  It makes it easy to spot SEO issues you might have in the site, and pinpoint ways to optimize it further.

ASP .NET 4 SEO Improvement

ASP.NET 4 includes a bunch of new runtime features that can help you to further optimize your site for SEO.  Some of these new features include:

- New Page.MetaKeywords and Page.MetaDescription properties
- New URL Routing support for ASP.NET Web Forms
- New Response.RedirectPermanent() method

Below are details about how you can take advantage of them to further improve your search engine relevancy.

Page.MetaKeywords and Page.MetaDescription properties

One simple recommendation to improve the search relevancy of pages is to make sure you always output relevant “keywords” and “description” <meta> tags within the <head> section of your HTML.  For example:

<head runat=”server”>
           <title>My Page Title</title>
           <meta name=”keywords” content=”These, are, my, keywords” />
           <meta name=”description” content=”This is the description of my page” />
</head>

One of the nice improvements with ASP.NET 4 Web Forms is the addition of two new properties to the Page class: MetaKeywords and MetaDescription that make programmatically setting these values within your code-behind classes much easier and cleaner. 

ASP.NET 4’s <head> server control now looks at these values and will use them when outputting the <head> section of pages.  This behavior is particularly useful for scenarios where you are using master-pages within your site – and the <head> section ends up being in a .master file that is separate from the .aspx file that contains the page specific content.  You can now set the new MetaKeywords and MetaDescription properties in the .aspx page and have their values automatically rendered by the <head> control within the master page.

Below is a simple code snippet that demonstrates setting these properties programmatically within a Page_Load() event handler:

void Page_Load(object sender, EventsArgs e)
{
           Page.Title = “Setting the <head>’s <title> programmatically was already supported”;

           Page.MetaDescription = “Now you can set the <head>’s <meta> description too”;
           Page.MetaKeywords = “scottgu, blog, simple, sample, keywords”;
}

In addition to setting the Keywords and Description properties programmatically in your code-behind, you can also now declaratively set them within the @Page directive at the top of .aspx pages.

As you’d probably expect, if you set the values programmatically they will override any values declaratively set in either the <head> section or the via the @Page attribute.
 

URL Routing with ASP.NET Web Forms

URL routing was a capability we first introduced with ASP.NET 3.5 SP1, and which is already used within ASP.NET MVC applications to expose clean, SEO-friendly “web 2.0” URLs.  URL routing lets you configure an application to accept request URLs that do not map to physical files. Instead, you can use routing to define URLs that are semantically meaningful to users and that can help with search-engine optimization (SEO).

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.  You can even have a single application that contains both Web Forms and MVC Controllers, and use a single set of routing rules to map URLs between them.

Response.RedirectPermanent() Method

It is pretty common within web applications to move pages and other content around over time, which can lead to an accumulation of stale links in search engines.

In ASP.NET, developers have often handled requests to old URLs by using the Response.Redirect() method to programmatically forward a request to the new URL.  However, what many developers don’t realize is that the Response.Redirect() method issues an HTTP 302 Found (temporary redirect) response, which results in an extra HTTP round trip when users attempt to access the old URLs.  Search engines typically will not follow across multiple redirection hops – which means using a temporary redirect can negatively impact your page ranking.  You can use the SEO Toolkit to identify places within a site where you might have this issue.

ASP.NET 4 introduces a new Response.RedirectPermanent(string url) helper method that can be used to perform a redirect using an HTTP 301 (moved permanently) response.  This will cause search engines and other user agents that recognize permanent redirects to store and use the new URL that is associated with the content.  This will enable your content to be indexed and your search engine page ranking to improve.

Below is an example of using the new Response.RedirectPermanent() method to redirect to a specific URL:

Response.RedirectPermanent(“NewPath/ForOldContent.aspx”);

ASP.NET 4 also introduces new Response.RedirectToRoute(string routeName) and Response.RedirectToRoutePermanent(string routeName) helper methods that can be used to redirect users using either a temporary or permanent redirect using the URL routing engine.  The code snippets below demonstrate how to issue temporary and permanent redirects to named routes (that take a category parameter) registered with the URL routing system.

// Issue temporary HTTP 302 redirect to a named route
Response.RedirectToRoute(“Products-Browse”, new { category = “beverages” });

//Issue permanent HTTP 301 redirect to a named route
Response.RedirectToRoutePermanent(“Products-Browse”, new { category = “beverages” } );

You can use the above routes and methods for both ASP.NET Web Forms and ASP.NET MVC based URLs.

Summary

ASP.NET 4 includes a bunch of feature improvements that make it easier to build public facing sites that have great SEO.  When combined with the SEO Toolkit, you should be able to use these features to increase user traffic to your site – and hopefully increase the direct or indirect revenue you make from them.


Reasons why you must trust ASPHostPortal.com

Every provider will tell you how they treat their support, uptime, expertise, guarantees, etc., are. Take a close look. What they're really offering you is nothing close to what ASPHostPortal does. You will be treated with respect and provided the courtesy and service you would expect from a world-class web hosting business.

You’ll have highly trained, skilled professional technical support people ready, willing, and wanting to help you 24 hours a day. Your web hosting account servers are monitored from three monitoring points, with two alert points, every minute, 24 hours a day, 7 days a week, 365 days a year. The followings are the list of other added- benefits you can find when hosting with us:

- DELL Hardware
Dell hardware is engineered to keep critical enterprise applications running around the clock with clustered solutions fully tested and certified by Dell and other leading operating system and application providers.
- Recovery Systems
Recovery becomes easy and seamless with our fully managed backup services. We monitor your server to ensure your data is properly backed up and recoverable so when the time comes, you can easily repair or recover your data.
- Control Panel
We provide one of the most comprehensive customer control panels available. Providing maximum control and ease of use, our Control Panel serves as the central management point for your ASPHostPortal account. You’ll use a flexible, powerful hosting control panel that will give you direct control over your web hosting account. Our control panel and systems configuration is fully automated and this means your settings are configured automatically and instantly.
- Excellent Expertise in Technology
The reason we can provide you with a great amount of power, flexibility, and simplicity at such a discounted price is due to incredible efficiencies within our business. We have not just been providing hosting for many clients for years, we have also been researching, developing, and innovating every aspect of our operations, systems, procedures, strategy, management, and teams. Our operations are based on a continual improvement program where we review thousands of systems, operational and management metrics in real-time, to fine-tune every aspect of our operation and activities. We continually train and retrain all people in our teams. We provide all people in our teams with the time, space, and inspiration to research, understand, and explore the Internet in search of greater knowledge. We do this while providing you with the best hosting services for the lowest possible price.
- Data Center
ASPHostPortal modular Tier-3 data center was specifically designed to be a world-class web hosting facility totally dedicated to uncompromised performance and security
- Monitoring Services
From the moment your server is connected to our network it is monitored for connectivity, disk, memory and CPU utilization - as well as hardware failures. Our engineers are alerted to potential issues before they become critical.
- Network
ASPHostPortal has architected its network like no other hosting company. Every facet of our network infrastructure scales to gigabit speeds with no single point of failure.
- Security
Network security and the security of your server are ASPHostPortal's top priorities. Our security team is constantly monitoring the entire network for unusual or suspicious behavior so that when it is detected we can address the issue before our network or your server is affected.
- Support Services
Engineers staff our data center 24 hours a day, 7 days a week, 365 days a year to manage the network infrastructure and oversee top-of-the-line servers that host our clients' critical sites and services.

 



Visual Basic 2010 Hosting - ASPHostPortal :: What's New in the Visual Basic 2010

clock May 20, 2010 07:15 by author Jervis

This topic contains brief information about Visual basic 2010. If you looking for Visual basic 2010 hosting, you can always consider ASPHostPortal. At ASPHostPortal you can get a professional Visual basic installation with your Visual basic Hosting account. You can always start from our Portal ONE hosting plan (from @$5.00/month) to get this application installed on your website. So, why wait longer?

Visual Basic Complier and Language

Auto-Implemented Properties


Auto-implemented properties provide a shortened syntax that enables you to quickly specify a property of a class without having to write code to Get and Set the property.

Collection Initializers

Collection initializers provide a shortened syntax that enables you to create a collection and populate it with an initial set of values. Collection initializers are useful when you are creating a collection from a set of known values, for example, a list of menu options or categories.

Implicit Line Continuation

In many cases, implicit line continuation enables you to continue a statement on the next consecutive line without using the underscore character (_).

Multiline Lambda Expressions and Subroutines

Lambda expression support has been expanded to support subroutines in addition to multiline lambda functions and subroutines.

New Command-Line Option for Specifying a Language Version

The /langversion command-line option causes the compiler to accept only syntax that is valid in the specified version of Visual Basic.

Type Equivalence Support

You can now deploy an application that has embedded type information instead of type information that is imported from a Primary Interop Assembly (PIA). With embedded type information, your application can use types in a runtime without requiring a reference to the runtime assembly. If various versions of the runtime assembly are published, the application that contains the embedded type information can work with the various versions without having to be recompiled.

Dynamic Support

Visual Basic binds to objects from dynamic languages such as IronPython and IronRuby.

Covariance and Contravariance

Covariance enables you to use a more derived type than that specified by the generic parameter, whereas contravariance enables you to use a less derived type. This allows for implicit conversion of classes that implement variant interfaces and provides more flexibility for matching method signatures with variant delegate types. You can create variant interfaces and delegates by using the new In and Out language keywords. The .NET Framework also introduces variance support for several existing generic interfaces and delegates, including the IEnumerable<(Of <(T>)>) interface and the Func<(Of <(TResult>)>) and Action<(Of <(T>)>) delegates.

Integrated Development Environment

Navigate to

You can use the Navigate To feature to search for a symbol or file in source code. You can search for keywords that are contained in a symbol by using Camel casing and underscore characters to divide the symbol into keywords.

Highlighting References

When you click a symbol in source code, all instances of that symbol are highlighted in the document.

For many control structures, when you click a keyword, all of the keywords in the structure are highlighted. For instance, when you click If in an If...Then...Else construction, all instances of If, Then, ElseIf, Else, and End If in the construction are highlighted.

To move to the next or previous highlighted symbol, you can use CTRL+SHIFT+DOWN ARROW or CTRL+SHIFT+UP ARROW.

Generate from Usage

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

Generate From Usage supports programming styles such as test-first development.

IntelliSense Suggestion Mode

IntelliSense now provides two alternatives for IntelliSense statement completion: completion mode and suggestion mode. Suggestion mode is used when classes and members are used before they are defined.

Sample Application

Visual Basic includes new sample applications that demonstrate the following features: auto-implemented properties, implicit line continuation, collection initializers, covariance and contravariance, and multiline lambda expressions and subroutines.


Reasons why you must trust ASPHostPortal.com


Every provider will tell you how they treat their support, uptime, expertise, guarantees, etc., are. Take a close look. What they're really offering you is nothing close to what ASPHostPortal does. You will be treated with respect and provided the courtesy and service you would expect from a world-class web hosting business.

You’ll have highly trained, skilled professional technical support people ready, willing, and wanting to help you 24 hours a day. Your web hosting account servers are monitored from three monitoring points, with two alert points, every minute, 24 hours a day, 7 days a week, 365 days a year. The followings are the list of other added- benefits you can find when hosting with us:

- DELL Hardware
Dell hardware is engineered to keep critical enterprise applications running around the clock with clustered solutions fully tested and certified by Dell and other leading operating system and application providers.
- Recovery Systems
Recovery becomes easy and seamless with our fully managed backup services. We monitor your server to ensure your data is properly backed up and recoverable so when the time comes, you can easily repair or recover your data.
- Control Panel
We provide one of the most comprehensive customer control panels available. Providing maximum control and ease of use, our Control Panel serves as the central management point for your ASPHostPortal account. You’ll use a flexible, powerful hosting control panel that will give you direct control over your web hosting account. Our control panel and systems configuration is fully automated and this means your settings are configured automatically and instantly.
- Excellent Expertise in Technology
The reason we can provide you with a great amount of power, flexibility, and simplicity at such a discounted price is due to incredible efficiencies within our business. We have not just been providing hosting for many clients for years, we have also been researching, developing, and innovating every aspect of our operations, systems, procedures, strategy, management, and teams. Our operations are based on a continual improvement program where we review thousands of systems, operational and management metrics in real-time, to fine-tune every aspect of our operation and activities. We continually train and retrain all people in our teams. We provide all people in our teams with the time, space, and inspiration to research, understand, and explore the Internet in search of greater knowledge. We do this while providing you with the best hosting services for the lowest possible price.
- Data Center
ASPHostPortal modular Tier-3 data center was specifically designed to be a world-class web hosting facility totally dedicated to uncompromised performance and security
- Monitoring Services
From the moment your server is connected to our network it is monitored for connectivity, disk, memory and CPU utilization - as well as hardware failures. Our engineers are alerted to potential issues before they become critical.
- Network
ASPHostPortal has architected its network like no other hosting company. Every facet of our network infrastructure scales to gigabit speeds with no single point of failure.
- Security
Network security and the security of your server are ASPHostPortal's top priorities. Our security team is constantly monitoring the entire network for unusual or suspicious behavior so that when it is detected we can address the issue before our network or your server is affected.
- Support Services
Engineers staff our data center 24 hours a day, 7 days a week, 365 days a year to manage the network infrastructure and oversee top-of-the-line servers that host our clients' critical sites and services.

 



ASP.NET 4 Hosting - ASPHostPortal :: What's New in .NET 4 Framework

clock May 19, 2010 05:10 by author Jervis

This topic contains brief information about .NET 4 Framework. If you looking for ASP.NET 4 hosting, you can always consider ASPHostPortal. At ASPHostPortal you can get a professional ASP.NET 4 installation with your ASP.NET 4 Hosting account. You can always start from our Portal ONE hosting plan (from @$5.00/month) to get this application installed on your website. So, why wait longer?

Other new features and improvements in the .NET Framework 4 are described in the following sections:

1. Application Compatibility and Deployment
The .NET Framework 4 is highly compatible with applications that are built with earlier .NET Framework versions, except for some changes that were made to improve security, standards compliance, correctness, reliability, and performance.

The .NET Framework 4 does not automatically use its version of the common language runtime to run applications that are built with earlier versions of the .NET Framework. To run older applications with .NET Framework 4, you must compile your application with the target .NET Framework version specified in the properties for your project in Visual Studio.

The following sections describe deployment improvements.

- Client Profile
The .NET Framework 4 Client Profile supports more platforms than in previous versions and provides a fast deployment experience for your Windows Presentation Foundation (WPF), console, or Windows Forms applications.

- In-Process Side-by-Side-Execution
This feature enables an application to load and start multiple versions of the .NET Framework in the same process. For example, you can run applications that load add-ins (or components) that are based on the .NET Framework 2.0 SP1 and add-ins that are based on the .NET Framework 4 in the same process.

2. Core New Features and Improvements
The following sections describe new features and improvements provided by the common language runtime and the base class libraries.

- Diagnostics and Performance
Earlier versions of the .NET Framework provided no way to determine whether a particular application domain was affecting other application domains, because the operating system APIs and tools, such as the Windows Task Manager, were precise only to the process level. Starting with the .NET Framework 4, you can get processor usage and memory usage estimates per application domain.

You can monitor CPU and memory usage of individual application domains. Application domain resource monitoring is available through the managed and native hosting APIs and event tracing for Windows (ETW). When this feature has been enabled, it collects statistics on all application domains in the process for the life of the process.

- Garbage Collection
The .NET Framework 4 provides background garbage collection. This feature replaces concurrent garbage collection in previous versions and provides better performance.

- Code Contracts
Code contracts let you specify contractual information that is not represented by a method's or type's signature alone. The new System.Diagnostics.Contracts namespace contains classes that provide a language-neutral way to express coding assumptions in the form of preconditions, postconditions, and object invariants. The contracts improve testing with run-time checking, enable static contract verification, and support documentation generation.

- Design-Time-Only Interop Assemblies
You no longer have to ship primary interop assemblies (PIAs) to deploy applications that interoperate with COM objects. In the .NET Framework 4, compilers can embed type information from interop assemblies, selecting only the types that an application (for example, an add-in) actually uses. Type safety is ensured by the common language runtime.

- Dynamic Language Runtime
The dynamic language runtime (DLR) is a new runtime environment that adds a set of services for dynamic languages to the CLR. The DLR makes it easier to develop dynamic languages to run on the .NET Framework and to add dynamic features to statically typed languages. To support the DLR, the new System.Dynamic namespace is added to the .NET Framework.

The expression trees are extended with new types that represent control flow, for example, System.Linq.Expressions..::.LoopExpression and System.Linq.Expressions..::.TryExpression. These new types are used by the dynamic language runtime (DLR) and not used by LINQ.

In addition, several new classes that support the .NET Framework infrastructure are added to the System.Runtime.CompilerServices namespace.

- Covariance and Contravariance
Several generic interfaces and delegates now support covariance and contravariance.

- BigInteger and Complex Numbers
The new System.Numerics..::.BigInteger structure is an arbitrary-precision integer data type that supports all the standard integer operations, including bit manipulation. It can be used from any .NET Framework language. In addition, some of the new .NET Framework languages (such as F# and IronPython) have built-in support for this structure.

The new System.Numerics..::.Complex structure represents a complex number that supports arithmetic and trigonometric operations with complex numbers
.

- Tuples
The .NET Framework 4 provides the System..::.Tuple class for creating tuple objects that contain structured data. It also provides generic tuple classes to support tuples that have from one to eight components (that is, singletons through octuples). To support tuple objects that have nine or more components, there is a generic tuple class with seven type parameters and an eighth parameter of any tuple type.
 

- File System Enumeration Improvements
New file enumeration methods improve the performance of applications that access large file directories or that iterate through the lines in large files.

- Memory-Mapped Files
You can use memory-mapped files to edit very large files and to create shared memory for interprocess communication.

- 64-Bit Operating Systems and Processes
You can identify 64-bit operating systems and processes with the Environment..::.Is64BitOperatingSystem and Environment..::.Is64BitProcess properties
.

- Other New Features
The following list describes additional new capabilities, improvements, and conveniences. Several of these are based on customer suggestions.
1. To upport culture-sensitive formatting, the System..::.TimeSpan structure includes new overloads of the ToString, Parse, and TryParse methods, as well as new ParseExact and TryParseExact methods
.

2. The new String..::.IsNullOrWhiteSpace method indicates whether a string is null, empty, or consists only of white-space characters. New overloads have been added to the String.Concat and String.Join methods that concatenate members of System.Collections.Generic..::.IEnumerable<(Of <(T>)>) collections.

3. The String..::.Contract method lets you concatenate each element in an enumerable collection without first converting the elements to strings.

4. Two new convenience methods are available: StringBuilder..::.Clear and Stopwatch..::.Restart.

5. The new Enum..::.HasFlag method determines whether one or more bit fields or flags are set in an enumeration value. The Enum..::.TryParse method returns a Boolean value that indicates whether a string or integer value could be successfully parsed.

6. The System..::.Environment..::.SpecialFolder enumeration contains several new folders.

7. You can now easily copy one stream into another with the CopyTo method in classes that inherit from the System.IO..::.Stream class.

8. New Path..::.Combine method overloads enable you to combine file paths.

9. The new System..::.IObservable<(Of <(T>)>) and System..::.IObserver<(Of <(T>)>) interfaces provide a generalized mechanism for push-based notifications.

10. The System..::.IntPtr and System..::.UIntPtr classes now include support for the addition and subtraction operators.

11. You can now enable lazy initialization for any custom type by wrapping the type inside a System..::.Lazy<(Of <(T>)>) class.

12. The new System.Collections.Generic..::.SortedSet<(Of <(T>)>) class provides a self-balancing tree that maintains data in sorted order after insertions, deletions, and searches. This class implements the new System.Collections.Generic..::.ISet<(Of <(T>)>) interface.

13. The compression algorithms for the System.IO.Compression..::.DeflateStream and System.IO.Compression..::.GZipStream classes have improved so that data that is already compressed is no longer inflated. Also, the 4-gigabyte size restriction for compressing streams has been removed.

14. The new Monitor..::.Enter(Object, Boolean%) method overload takes a Boolean reference and atomically sets it to true only if the monitor is successfully entered.

15. You can use the Thread..::.Yield method to have the calling thread yield execution to another thread that is ready to run on the current processor.

16. The System..::.Guid structure now contains the TryParse and TryParseExact methods.

17. The new Microsoft.Win32..::.RegistryOptions enumeration lets you specify a volatile registry key that does not persist after the computer restarts.

Managed Extensibility Framework

The Managed Extensibility Framework (MEF) is a new library in the .NET Framework 4 that helps you build extensible and composable applications. MEF enables you to specify points where an application can be extended, to expose services to offer to other extensible applications and to create parts for consumption by extensible applications. It also enables easy discoverability of available parts based on metadata, without the need to load the assemblies for the parts.

Parallel Computing

The .NET Framework 4 introduces a new programming model for writing multithreaded and asynchronous code that greatly simplifies the work of application and library developers. The new model enables developers to write efficient, fine-grained, and scalable parallel code in a natural idiom without having to work directly with threads or the thread pool. The new System.Threading.Tasks namespace and other related types support this new model. Parallel LINQ (PLINQ), which is a parallel implementation of LINQ to Objects, enables similar functionality through declarative syntax.

Networking

Networking improvements include the following:

1. Security improvements for Windows authentication in several classes, including System.Net..::.HttpWebRequest, System.Net..::.HttpListener, System.Net.Mail..::.SmtpClient, System.Net.Security..::.SslStream, and System.Net.Security..::.NegotiateStream. Extended protection is available for applications on Windows 7 and Windows Server 2008 R2.

2. Support for Network Address Translation (NAT) traversal using IPv6 and Teredo.

3. New networking performance counters that provide information about HttpWebRequest objects.

4. In the System.Net..::.HttpWebRequest class, support for using large byte range headers (64-bit ranges) with new overloads for the AddRange method. New properties on the System.Net..::.HttpWebRequest class allow an application to set many HTTP headers. You can use the Host property to set the Host header value in an HTTP request that is independent from the request URI.


5. Secure Sockets Layer (SSL) support for the System.Net.Mail..::.SmtpClient and related classes.

6. Improved support for mail headers in the System.Net.Mail..::.MailMessage class.

7. Support for a null cipher for use in encryption. You can specify the encryption policy by using the System.Net..::.ServicePointManager class and the EncryptionPolicy property. Constructors for the System.Net.Security..::.SslStream class now take a System.Net.Security..::.EncryptionPolicy class as a parameter.

8. Credentials for password-based authentication schemes such as basic, digest, NTLM, and Kerberos authentication in the System.Net..::.NetworkCredential class. To improved security, passwords may now be treated as System.Security..::.SecureString instances rather than System..::.String instances.

9. Ability to specify how a URI with percent-encoded values is converted and normalized in the System..::.Uri and System.Net..::.HttpListener classes.

Web

ASP.NET version 4 introduces new features in the following areas:

1. Core services, including a new API that lets you extend caching, support for compression for session-state data, and a new application preload manager (autostart feature).

2. Web Forms, including more integrated support for ASP.NET routing, enhanced support for Web standards, updated browser support, new features for data controls, and new features for view state management.

3. Web Forms controls, including a new Chart control.

4. MVC, including new helper methods for views, support for partitioned MVC applications, and asynchronous controllers.

5. Dynamic Data, including support for existing Web applications, support for many-to-many relationships and inheritance, new field templates and attributes, and enhanced data filtering.

6. Microsoft Ajax, including additional support for client-based Ajax applications in the Microsoft Ajax Library.

7. Visual Web Developer, including improved IntelliSense for JScript, new auto-complete snippets for HTML and ASP.NET markup, and enhanced CSS compatibility.

8. Deployment, including new tools for automating typical deployment tasks.

9. Multi-targeting, including better filtering for features that are not available in the target version of the .NET Framework.

Client

Windows Presentation Foundation
In the .NET Framework 4, Windows Presentation Foundation (WPF) contains changes and improvements in many areas, including controls, graphics, and XAML.

Data

ADO. NET
ADO.NET provides new features for the Entity Framework, including Persistence-Ignorant Objects, functions in LINQ queries, and Customized Object Layer Code Generation.

Dynamic Data
For ASP.NET 4, Dynamic Data has been enhanced to give you even more power for quickly building data-driven Web sites. This includes the following:

- Automatic validation that is based on constraints that are defined in the data model.

- The ability to easily change the markup that is generated for fields in the GridView and DetailsView controls by using field templates that are part of a Dynamic Data project.

Communications and Workflow

Windows Communication Foundation (WCF) provides messaging enhancements and seamless integration with Windows Workflow Foundation (WF). WF provides improvements in performance, scalability, workflow modeling, and an updated visual designer.

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