Installing Visual Studio Team Foundation Server 2010-Basic Configuration Step By Step

Installing Visual Studio Team Foundation Server 2010 (TFS 2010) is pretty simple, there are few types of installation available in TFS 2010/2012, they are:

  1. Basic
  2. Standard Single  Server
  3. Advanced
  4. Advanced-Tier only

In this installation, I am going to choose the basic installation right now (TFS 2010) and I will post the advanced installation (in TFS 2012) later!🙂

1. Double click the Setup.exe OR tfs_server.exe in your installation media!


2. You will get the following screen after few seconds, click Next


3. Select the license term and click Next


4. Select the necessary features and installation path then click install button.


5. Installation in progress


6. Few minutes later, you will get the following Success screen!🙂


Select the Launch TFS Configuration Tool check box, and then click Configure button! I will post other screens tomorrow!🙂

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The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request.

I have got the following error when I was developing a gridview editing on a webpage last week. This is most common issue, even I have faced several times earlier. But I want to keep this solution for beginners!

Here is the full error message:

"Failed to load viewstate.  The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request.  For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request"


My 1st suggestion is just check the cache! Meaning..clear your browser cache and refresh it and see whether it is working? if not continue with one of the following solutions!

1. Enable ViewState is false

Find the control which is giving problem in the page and then disable the ViewState! For me it was a  DropDownList so,

<asp:DropDownList ID="DropDownList1" runat="server" EnableViewState="false">

2. Just place the data binding on the GridView events wherever you use the edit! For and example “RowCancelingEdit”

Protected Sub GridViewRelease_RowCancelingEdit(ByVal sender As Object, ByVal e As GridViewCancelEditEventArgs) Handles GridViewRelease.RowCancelingEdit
GridViewReleaseAnalyst.EditIndex = -1
End Sub

That’s all, No more ViewState issue! Happy Programming!!



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2012 in Review!

The stats helper monkeys prepared a 2012 annual report for this blog.

Here’s an excerpt:

4,329 films were submitted to the 2012 Cannes Film Festival. This blog had 28,000 views in 2012. If each view were a film, this blog would power 6 Film Festivals

Click here to see the complete report.

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Getting started with Windows 8 Metro Style Application using C# – Visual Studio 2012

Windows 8  and Visual studio 2012 are released now but I have created this simple (My 1st) Metro Style Application using Release Previews few months ago. I didn’t get a chance to post, but I need to post this today otherwise its too late..!🙂

This is my environment:

  1. Windows 8 Release Preview 64 bit
  2. Visual Studio 2012 RC Ultimate for Windows 8 Release Preview
  3. C#
  4. Extensible Application Markup Language (XAML)

I have installed all of the necessary tools and I will show the step by step instructions to create a simple Metro Style Application in this post.  I think this will help someone to get started with Windows 8 development using C# and XAML🙂

Okay, here are the steps:

Step 1: Installing Windows 8, I used Release Preview and you can see few steps here

Step 2: Installing Visual Studio 2012, I used RC Ultimate and you can check the steps here

Step 3: Launching Visual Studio 2012

  • Click the start menu

  • Select the Visual Studio 2012 on the Windows 8 (It’s little tricky to switch from start menu to other programs for first time users)

Step 4: You will get Visual Studio 2012 (it looks same like 2010 but different theme), select the New Project

Step 5: You will get the following screen, select the Visual C# and Windows Metro Style under Templates. Please make sure to choose .NET Framework 4.5

Step 6: Select the Blank App (XAML) and enter the Name of the project, I have given “MetroStyleApplicathionStepBiStep” and then click Ok.


Step 7: After creating the project you can see the Visual Studio like below

Step 8: If you don’t get the screen above, just double click on the MainPage.xaml.  You will get the XAML design and code together but this is bit difficult to design the screen, so click on the % drop down on the bottom of the Visual Studio and the change it to fit all

  • Your screen should be look like this now.

Step 9: In Solution Explorer,  we can see all the files and folder structure. if you want to learn more about just follow this link

Step 10: Okay we will design the page 1st, In the Toolbox you can see all the controls like other Visual Studio, drag and drop the TextBlock on the design screen

In the TextBlock’s properties make the following changes

Name: TextBlockHeading

Text: Hello, Metro Style Application!

Text size: 48 px

Step 11: If you want to adjust the TextBlock positions, you can either use the design Or modify the XAML code

Step 11: After finishing the Text Block, we need to add a Text Box, button and another Text Block to the page and make the necessary changes for them. The design should looks like this:

XAML code:

Step 12: Double click on the button and find the ButtonDisplay event, write the necessary C# code to display the value from the Text Box. Here is the source code

        private void ButtonDisplay_Click(object sender, RoutedEventArgs e)
            TextBlockDisplay.Text = &quot;Hello, &quot; + TextBoxEnter.Text;
            ButtonDisplay.Content = &quot;Displayed&quot;;

Step 13: Okay, Click the Run button Or press F5 to run the application (We have few interesting options to run the application, I will modify the post tomorrow :)), you will get the following screen.

Step 14: Enter any text in the text box, I just entered Step Bi Step and click Display. Here you go, your 1st Metro style application is done! Pretty simple no? Enjouy!

 Happy Metro Styling..!🙂

PS: This is my 50th post in 10 months and I have reached 20k hits in this period!🙂 Please do post comments, if you have any concerns..! Thanks R./

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An invalid VARIANT was detected during a conversion from an unmanaged VARIANT to a managed object – C#

I have got this exception after I fixed this error, please check this post and read the following…!

Error Message:

“An invalid VARIANT was detected during a conversion from an unmanaged VARIANT to a managed object. Passing invalid VARIANTs to the CLR can cause unexpected exceptions, corruption or data loss.”

Just go to the Debug menu in Visual studio and select Exceptions

Click and expand the Manage Debugging Assistants

Find the Invalid Variant node and uncheck the Thrown check box.

Click Ok and run the application, That’s all! Happy Programming..! If you want to read more about this issue, just read this post!🙂


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The CLR has been unable to transition from COM context 0xXXXXXXX to COM context 0xYYYYYYY for 60 seconds – C#

Few months ago, I was developing a small windows application which gathers data from Active Directory(AD) and dumping into a SQL database table. There were around 18 to 20,000 records involved in the process. After developing and testing components with few data, everything was okay but when I run the application I got following error message:

“The CLR has been unable to transition from COM context 0x2297ce0 to COM context 0x2297f30 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulating continually over time. To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations.”

I didn’t want to spend too much time with this error and I have found the quick fix from this site, if you want to know more about this please read there.😉

Here are the steps to fix this error;

Step 1: Go to Debug –> Exceptions  in Visual Studio 2010 (I was using 2010)

Step 2: Click on  Managed Debug Assistants

Step 3:  Un-check the ContextSwitchDeadlock and click OK

That’s all,  the problem was fixed but I have got an other error, please see the same kind of solution here.


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