What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

UPDATE dated August 17, 2009

Once I posted this entry, there is a lot of interest that has been shown and few queries as well.  So I thought I need to update this post.

This is only the first post in the series on ASP.NET 4.0 fetaures.  There are lot of ground breaking things and other enhancements that are pretty exciting.

To the folks who asked for "why MS changing dev platform once in 18 months"

There is no change.  there are a few enhancements.  Post .NET 2.0 there have been a lot of additional APIs such as LINQ, Entity Framework etc., which are different ways of data handling.  While core ADO.NET is still valid, these are additional enhancements that can be used at the Developer's / Architect's discretion. 

For the folks you asked about URL Rewriting

There is URL Routing which is much better than URL Rewriting.  We have talked about it, enough in the past .  You can read more about it at http://www.mostlylucid.net/archive/2009/01/25/asp.net-4.0-webform-routing-quick-rsquon-dirty-version.aspx

I will be covering more features in the following post.

Thanks for the inerest

With Visual Studio 2010 Beta 1 and .NET Framework Beta 1 out for some time, this post is due from me for a long time.   ASP.NET 4.0 has many improvements for different set of scenarios such as Webforms, Dynamic Data & AJAX based web development.  There are also a lot of enhancements to the core runtime that powers ASP.NET such as Caching, Session & Request/Response objects.

For this post, we will examine some of the web form enhancements.  There are sure a lot of them and we will examine some of them in the future posts.

Controlling View State using the ViewStateMode Property – Performance Enhancement

One of the most complained thing in ASP.NET Webform is the growing viewstate which becomes a concern for performance.  While earlier you can set the EnableViewState property to true or false, post that, all the controls, by default inherit and even if you set it to enabled at control level, the behaviour was inconsistent.

With ASP.NET 4.0, the ViewStateMode property helps to determine for every control, whether the ViewState should be enabled, disabled or inherited accordingly.  Ex.-

<asp:Panel ID="pnlViewState" runat="server" ViewStateMode="Disabled">
      Disabled: <asp:Label ID="label1" runat="server"  Text="Value set in markup" ViewStateMode="Inherit"  /><br />
           Enabled: <asp:Label ID="label2"  runat="server" Text="Value set in markup" ViewStateMode="Enabled" />
  <hr />
  <asp:button ID="Button1" runat="server"  Text="Postback" />
    </asp:Panel>

In the code-behind

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            label1.Text = "Value set in code behind";
            label2.Text = "Value set in code behind";
        }
    }

When you run the above page, you can find that the intial value for both the labels is set to “Value set in code behind” whereas after clicking on the button (postback), the value of label1 changes to “Value set in markup” whereas the value of label2 remains unchanged.  As you can see, the Panel which holds both these lables has ViewStateMode set to Disabled and label1 is inherting the mode (this is the default if not specified) and label2 has it enabled.  That is the reason label2 maintains viewstate while label1 loses it.

While it is arguably possible using the simple EnableViewState property earlier, it was never consistent.  Considering the fact that in most of our performance sessions, we talk about disabling viewstate and then enabling it at control level while it doesnt work, this ViewStateMode is a welcome architectural change to improve performance.

Page Meta Keyword & Description – Search Engine Optimization feature

Upto Visual Studio 2008, one can set the Title of the page declaratively or through program using Page.Title.  However, as more and more web traffic is happening through search engines, Page’s Title, Keyword and description become more important.  Although the Keyword feature was exploited and hence many search engines today ignore it, Page Description is something still major search engines such as Google, Bing use for identifying and indexing pages based on content.

The new feature in ASP.NET 4.0 allows users to programmatically set the Page Description and Keywords as follows:-

protected void Page_Load(object sender, EventArgs e)
    {
        this.Page.Title = "My ASP.NET Blog";
        this.Page.MetaKeywords = "ASP.NET, Web Development, Blog, ASP.NET Blog";
        this.Page.MetaDescription = "This Blog contains posts related to ASP.NET and Web Development";
    }

The above code appends the following markup

<meta name="keywords" content="ASP.NET, Web Development, Blog, ASP.NET Blog" />

<meta name="description" content="This Blog contains posts related to ASP.NET and Web Development" />

And the way it works is that, if the meta tags are already present in the HTML markup, whatever is set in the code behind  will fill up the “content” part alone if the “name” tag is matching.

Although this looks simple, it is very useful in cases where you want to set these dynamically based on a condition / criteria.  So far, these were set statically in the HTML.  Now with Page Class level access, these can be set dynamically.

There are many more enhancements to Webforms such as Routing improvements, setting ClientID etc., which we will examine in the future posts.

Cheers !!!

Print | posted on Friday, August 14, 2009 6:15 AM

Comments on this post

# re: What’s new in ASP.NET 4.0

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Nice post,
Keep writing more on ASP.Net 4.0. Just one question. What are performance improvements in ASP.Net engine itself. Does they come from improvements in CLR or they come from code improvments.
I am looking for new features, but I am also concerned about the performance.
Thanks
Left by Shail on Aug 14, 2009 7:18 AM

# re: What’s new in ASP.NET 4.0

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I like the addition of the Page class level access to meta information. Up until now, our inhouse CMS has been simply writing the entire title and meta info to a literal.
Left by Textbox on Aug 14, 2009 8:57 AM

# re: What’s new in ASP.NET 4.0

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Really nice new features, especially the new ViewState feature.
Thank you for sharing this with us.
Left by Abdulla AbdelHaq on Aug 14, 2009 5:33 PM

# re: What’s new in ASP.NET 4.0

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ms change develop paradigm every 18 month: for example on data access that i do not know use: ado ado.net linq mvc system.
I'm passing froma asp- asp.net to php.. sorry
Left by GIORGIO on Aug 14, 2009 5:43 PM

# re: What’s new in ASP.NET 4.0

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Nice post. I think we will discover much more new features and advantages of VS.NET 2010 together with ASP.NET 4.0.
Left by hajan on Aug 14, 2009 8:23 PM

# re: What’s new in ASP.NET 4.0

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Hi,

Nice article. How about MVC framework ? Its going to be next ASP.Net version .

Thaks,
Thani
Left by Thanigainathan on Aug 14, 2009 10:06 PM

# re: What’s new in ASP.NET 4.0

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What about PHP 5.3? It looks promising...
Left by Joe on Aug 15, 2009 1:22 AM

# re: What’s new in ASP.NET 4.0

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Nice article.
Left by Ashraf on Aug 15, 2009 3:17 AM

# re: What’s new in ASP.NET 4.0

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More article on Asp.net 4.0 , Keep posting so that we can help
Left by Rabindra on Aug 15, 2009 8:36 PM

# Fix title tag render

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You mentioned Page.Title, so I hope it is right place to complain. Up until now ASP.NET renders title tag with newlines and indent. To fix this I have to put hack (found on asp.net forums) in every Application_Startup, so title renders inline. Is it going to be changed in 4.0?
Left by Vienīgais on Aug 16, 2009 3:12 AM

# re: What’s new in ASP.NET 4.0

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Thanks alot !.

Keep showing us the new enhancements.
Left by elearning on Aug 16, 2009 6:03 AM

# re: What’s new in ASP.NET 4.0

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asp.net 4.0

it's give smart works on ajax web devlopment.
nice............

Left by jayesh on Aug 16, 2009 11:14 AM

# re: What’s new in ASP.NET 4.0

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it's about technology that gives better perfomance.

tell me about next version of this,like asp.net 5.0
jayesh_citc@yahoo.com
Left by jayesh chauhan on Aug 16, 2009 11:20 AM

# re: What’s new in ASP.NET 4.0

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Is there any URL rewriting built-in feature ?
Left by Nabil Orfali on Aug 16, 2009 9:12 PM

# re: What’s new in ASP.NET 4.0

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Nabil....wonderful question.
In Microsoft world, you keep lacking the same old features/functionalities. They just add new plug-ins. However, i have heard that there is a feature going to come for URL rewriting, but will be aligned inside the IIS. Hence developers may not be able to benefit this functionality if they host their application in a shared environment.
Left by Ziyad on Aug 16, 2009 11:55 PM

# re: What’s new in ASP.NET 4.0

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what will microsoft want to do?
every year with new sotware.where is the final version of asp.net?
Left by ali reza on Aug 17, 2009 12:35 AM

# re: What’s new in ASP.NET 4.0

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It is so nice post.
Left by chandradev on Aug 17, 2009 3:09 AM

# re: What’s new in ASP.NET 4.0 - Part I

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Cool project, is there more topics about it you psted? Thx for sharing :)
Left by Nyubi on Aug 20, 2009 6:00 AM

# re: What’s new in ASP.NET 4.0 - Part I

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Nice post dear. Keep posting about new and interesting features of MS Technologies
Left by Arun Kumar Prajapati on Aug 20, 2009 1:43 PM

# re: What’s new in ASP.NET 4.0 - Part I

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Nice post sir.
Left by Gagan on Aug 21, 2009 2:28 AM

# What’s new in ASP.NET 4.0 - Part I

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Interesting & very informative. Keep updating such info! Software Training Company .
Left by Microsoft Training on Aug 21, 2009 4:43 AM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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Nice post.

Keep posting in more about ASP.NET 4.0

http://revolution-of-web.blogspot.com
Left by nishithraj on Nov 17, 2009 9:06 PM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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nice plaese send another example related other controls.
Left by rachna on Nov 18, 2009 7:02 PM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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Obviously this has been thought about as the people behind asp.net are top quality developers but is there a reason why there is so much code like Page.RouteData.Values["catname"] throughout the platform?
One question, is there any way in forthcoming release of ASP.net where I can encrypt entire URL or some part of it, so that it will be less hackable. Atleast the "QueryString" part. like
htp://www.localhost.com/products.aspx?jsafhsjdfrr454543ksdfkdsafjdsf
Left by Onlinecasino Liste on Dec 11, 2009 7:47 PM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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The consideration for SEO in ASP.NET 4.0 is amazing.

Nice post...

With regards
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Left by Lincy Lucy on Dec 13, 2009 9:03 PM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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Left by Bond007 on Dec 14, 2009 12:31 AM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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Great post! One thing: keywords are no longer used by any of the search engines to determine SEO. I still use them only to bullet-proof myself from future changes in the ranking algorithm. The description meta tag continues to be used for SERPS.
Left by Anthony on Dec 15, 2009 5:23 AM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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In Microsoft world, you keep lacking the same old features/functionalities. They just add new plug-ins. However, i have heard that there is a feature going to come for URL rewriting, but will be aligned inside the IIS. Hence developers may not be able to benefit this functionality if they host their application in a shared environment.
Left by Paris hotell on Dec 17, 2009 6:36 PM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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I don't thik, this will help for business. what i can tell to business is that we have good IDE for faster development. But think as a developer, can we use these feature in real world projects?

I was expecting some, atleast, improvements in performance. Again same .NET!


First of all why microsoft is not thinking about Max Length property of a Multi line text Box????

Does this property will work at least now
Left by Chinna Srihari on Dec 31, 2009 4:32 AM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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I have been able to do this since 2.0....

protected void WriteTags(TList<PagesMeta> pm)
{
HtmlMeta tag;

foreach (PagesMeta meta in pm)
{
tag = new HtmlMeta();
tag.Name = meta.Name;
tag.Content = meta.Contents;
Header.Controls.Add(tag);


}
}
Left by jeffrey m on Jan 07, 2010 12:50 AM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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Hi,
This is another article on new features of asp.net 4.0. You would like it.

http://www.codeproject.com/KB/aspnet/Whatis_New_ASP_Net_4.aspx
Left by Abdul Sami on Jan 07, 2010 6:56 AM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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Visit http://dotnet-ada.blogspot.com for Latest Microsoft DOTNET interview Questions answers
Left by bforum on Jan 15, 2010 12:42 AM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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Some of the new features in ASP.NET 2.0 are:

•Master Pages, Themes, and Web Parts
•Standard controls for navigation
•Standard controls for security
•Roles, personalization, and internationalization services
•Improved and simplified data access controls
•Full support for XML standards like, XHTML, XML, and WSDL
•Improved compilation and deployment (installation)
•Improved site management
•New and improved development tools
Left by free video song on Jan 15, 2010 6:09 AM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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Very nice article....
Left by Bharath Reddy VasiReddy on Jan 21, 2010 9:44 PM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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You can also refer to this article regarding new features on asp.net 4
http://www.codeproject.com/KB/aspnet/Whatis_New_ASP_Net_4.aspx
Left by nero on Jan 24, 2010 2:17 AM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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What are performance improvements in ASP.Net engine itself. Does they come from improvements in CLR or they come from code improvments.
Left by Sex Problems on Feb 08, 2010 5:04 AM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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Its very useful information
Left by Dineshkumar.S on Feb 24, 2010 6:42 AM

# Visual Studio 2010 in Focus at Great Indian Developer Summit 2010

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Mehfuz Hossain and Sachin Vinod Rathi is coming this April to India's 3rd Edition of Great Indian Developer Summit (developersummit dot com) to speak about putting the 2010 version of Visual Studio to use, which will be held on 20th April in IIsc, Bangalore
Left by Shaguf Mohtisham on Feb 24, 2010 3:59 PM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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I will forward this article to him. Pretty sure he will have a good read. Thanks for sharing!
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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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Thanks mate for this helpful post!
Left by Cebu SEO Specialist on Mar 27, 2010 8:12 PM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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Thanks for nice post.
Left by รับทำ SEO on Apr 02, 2010 4:47 PM

# # re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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The issue of viewstate is welcome but again it has only been a big problem for those that don't really understand how to use it properly.
Left by Piilolinssien Hintavertailu on May 02, 2010 4:14 AM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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hi there,

thanks for sharing this post! I have had a chance to try ASP.NET4.0 with ASPHostCentral (http://www.asphostcentral.com) and it does work great.

I could not wait for Microsoft to release the next version of ASP.NET. Would that be .NET5.0?
Left by Tracy Jackson on May 03, 2010 3:21 PM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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However, i have heard that there is a feature going to come for URL rewriting, but will be aligned inside the IIS. Hence developers may not be able to benefit this functionality if they host their application in a shared environment.
Left by Acne Scar Treatment on May 13, 2010 5:43 AM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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Mehfuz Hossain and Sachin Vinod Rathi is coming this April to India's 3rd Edition of Great Indian Developer Summit (developersummit dot com) to speak about putting the 2010 version of Visual Studio to use, which will be held on 20th April in IIsc, Bangalore
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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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three times I read this article, but still not understand. I bookmarks first this page, I will read at night so no disturb when I read your article
Left by Nunung on Jul 13, 2010 8:19 PM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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Nice post ,I Think this is nice feature relased microsoft for ASP.NET developer(viewstate performance and SEO)
Left by Chnadrasekhar on Jul 25, 2010 10:15 PM

# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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great new updates in the ASP.NET ... Thanks for the sharing !!!!
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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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Nice Post.Leep writing more about Asp.Net 4.0.
What's new features are add in 4.0?
In asp.net4.0,MVC add?
Please post about MVC?
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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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I could not wait for Microsoft to release the next version of ASP.NET. Would that be .NET5.0?
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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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# re: What’s new in ASP.NET 4.0 - Part I - View State & SEO Improvements

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