This update also resolves some issues that were not documented in a previously released Knowledge Base article. For more information about these issues, see the "More information" section.
How to obtain this update
0x643" error code occurs when you install this update
Issues that are resolved in this update
- You create a Visual Studio 2010-based add-in application. The add-in application enumerates several projects by using a background thread.
- You run an instance of Microsoft Visual Studio 2010 and the add-in application.
- Garbage collection runs.
Consider the following scenario:
- You develop a .NET Framework 4-based add-in application for Microsoft Office Excel.
- You run the add-in application, and then the Application.WorkbookBeforeSave event occurs.
Issue 3If the focus is set to a window of a Visual Studio 2010-based application when the computer enters sleep mode, a memory leak occurs when the computer resumes from sleep mode.
Issue 4When a .NET Framework 4-based Windows Presentation Foundation (WPF) application tries to load some text from a .ttf file, the text is displayed incorrectly. Additionally, an access violation occurs, and then the application crashes.
Note The stack trace resembles the following:
06bdeb5c 7108d327 dwrite!sfac_GetSbitBitmap()+0x428
06bdec10 7108d4d8 dwrite!GetSbitComponent()+0xb5
Issue 5When you perform a touch manipulation in a .NET Framework 4-based WPF application on a multitouch screen, the application crashes, or the *.vshost.exe process crashes. For example, the application crashes when you try to scroll up or to scroll down.
Issue 6When you try to select multiple items in the Pending Changes window in Visual Studio 2010, the Visual Studio IDE disappears, and a Dr. Watson error is not generated.
Issue 7Consider the following scenario:
- You run Visual Studio 2010 on a 64-bit operating system.
- You debug an application.
- You enable the managed debugging assistants (MDA).
- You try to close the application in the IDE.
Issue 8When you scroll in a .NET Framework 4-based WPF application while the text in a tab control is being formatted, the application runs slowly.
Issue 9When you try to host a webpage that has the targetFramework property set as the .NET Framework on a Server Core, you receive the following error message:
Parser Error Message: The 'targetFramework' attribute in the <compilation> element of the Web.config file is used only to target version 4.0 and later of the .NET Framework (for example, '<compilation targetFramework="4.0">'). The 'targetFramework' attribute currently references a version that is later than the installed version of the .NET Framework. Specify a valid target version of the .NET Framework, or install the required version of the .NET Framework.
Line 2: <configuration>
Line 3: <system.web>
Line 4: <compilation debug="false" targetFramework=".NETFramework, version=v4.0" />
Line 5: </system.web>Line 6: </configuration>
Consider the following scenario:
- You create a Visual Studio 2010 application that contains a Dataset database.
- You drop some tables from Dataset Designer.
- You check the order of the tables in Dataset Designer.
This issue occurs because of an error in the TableAdapterManager class in Visual Studio 2010.
Issue 11When a client requests the RESTful web service in an .asmx or a .svc file by using the ASP.NET pipeline and by using the extension-less URL handling, the state of the request might incorrectly change.
Issue 12In the .NET Framework 4, the Application_Start and PreAppStart methods do not have access to the HttpUtility.HtmlEncode method and to the related APIs.
Issue 13When you try to run a Microsoft Visual C# or Microsoft Visual Basic application, the application does not run if an Entity Data Model (EDM) references a database project. Additionally, the debugging features of the application do not work.
Issue 14When you use SQL providers, the following issues occur:
- An exception is thrown on the garbage collection thread.
- A Dr. Watson error occurs, and you receive an error message that resembles the following: Application: webdev.webserver20.exeBlamed Symbol:SYSTEM.DATA.NI.DLL!System.Data.ProviderBase.DbConnectionInternal.PrePushException code: system.invalidoperationexceptionEvent Sub type: Clr20r3
- The w3wp.exe process crashes.
Note The w3wp.exe process is a web-hosting process.
The SqlDataSource class does not support a parameter that is used to access data in a Microsoft SQL Server Compact Edition database.
This issue occurs because Microsoft SQL Server Compact Edition cannot support a parameter in the SqlDataSource class.
When you try to run an ASP.NET webpage, you receive the following error message:
The issue occurs because the Extensionless URL handler passes the parent IHttpUser interface to the child requests. Therefore, the child requests skip the authentication process.
Issue 17Consider the following scenario:
- You have a Visual Studio 2010-based project that has an Entity Data Model (EDM). The EDM references a database that is of medium or large size. For example, the database contains 500 tables.
- You try to reverse-engineer the tables.
Issue 18Consider the following scenario:
- You install Visual Studio 2010 Service Pack 1 (SP1) Beta on a computer that is running Internet Information Services (IIS) 6.0.
- You set the isolation mode to IIS 5.0.
- You host a webpage in IIS 6.0.
Issue 19After you install a hotfix package that applies the .NET Framework 4, all services that are hosted on Windows Process Activation Services (also known as WAS) may be turned off. Additionally, the services cannot be restarted until you restart the computer. An example of a service is a WAS-hosted Windows Communication Foundation (WCF) service.
The following are the affected activation services:
- Non-HTTP Activation
- Message Queuing Activation
- Named Pipes Activation
- TCP Activation
- TCP Port Sharing
Issue 20Consider the following scenario:
- You have an ASP.NET website that contains a WCF service. The website targets an earlier version of the .NET Framework 4.
- You do not click to select the Allow this precompiled site to be updatable check box in the Publish Web Site wizard in Visual Studio 2010.
- You publish the website.
- A client tries to access the WCF service.
Note The .svc.compile file is generated by the publishing process.
Issue 21Consider the following scenario:
- You bind the Windows.AutoHide command to a keyboard shortcut.
- You focus on a toggled tool window in Visual Studio 2010. For example, the focus is located on the Solution Explorer window.
- You press the keyboard shortcut.
Issue 22When you use Visual Studio 2010 to debug an application, many verbose messages that resemble the following are shown in the Output window:
*** Source File: d:\iso_whid\x86fre\base\isolation\com\copyout.cpp, line 1302
*** HR propagated: -2147024774
*** Source File: d:\iso_whid\x86fre\base\isolation\com\enumidentityattribute.cpp, line 144
Issue 23Assume that you build a web application on a computer and then publish the application on a different computer. When you use Visual Studio 2010 to attach the application, managed methods cannot be shown because of missing symbols for assemblies.
This problem occurs because the .pdb file that contains the information about symbols is not copied from the bin folder to the shadow copy folder.
Issue 24You use the My namespace in a Visual Basic project. When you add an explicit reference to the Microsoft.VisualBasic.dll component to the project, the My namespace cannot work correctly. For example, you may receive the following error message:
Issue 25When you install an ASP.NET 4.0 hotfix, the aspnet_regiis –iru command is triggered. Then, some ASP.NET registry keys are removed.
Issue 26When you request an .xap file through the Cassini in Visual Studio 2010, the MIME type of the returned response is "application/octet-stream" instead of the expected "application/x-silverlight-app."
Issue 27In the Visual Studio 2010 IDE, you attach the debugger to a sqlservr.exe process. You set a breakpoint at a managed SQL function or at a managed stored procedure. The symbol file is loaded correctly, and a solid red dot appears. However, Visual Studio does not break at the breakpoint.
You run a Visual Basic application that contains a Visual Basic Core assembly on an operating system that does not have the Visual Basic runtime. If the application contains a SyncLock statement on a variable of type Object, you may receive an error message that resembles the following:
Issue 29If you run a Visual Basic application that contains a Visual Basic core, the code that uses constants in the Microsoft.VisualBasic.Constants class cannot run correctly. For example, you may receive the following error message when the code is executed:
Issue 30You deploy a .NET Framework 4-based ASP.NET website in a legacy Code Access Security (CAS) mode. You configure the website with a partial trust. When you try to request this website, you may receive the following error message:
Issue 31You install the security update that is described in KB974417 when directories in the GAC folder, including the System.EnterpriseServices.dll assembly, are locked or the assembly is being used. In this scenario, the security update installation fails, and the computer becomes corrupted.
For more information about the issue, click the following article number to view the article in the Microsoft Knowledge Base:
2260913 FIX: Updating the .NET Framework may fail and some files in the GAC may be deleted
Issue 32Some unrestricted asserts from ASP.NET types may bring a risk that a partial-trust user can be elevated as a full-trust user.
Issue 33The simplified web application paradigm that is called Plan 9 MVC is released more frequently than ASP.NET. However, beginning with version 2, versions are not set as full trust. Therefore, many features that require full trust cannot work correctly.
This update sets the versions of Plan 9 later than version 2 to fully trust.
A constant in a device-level enumeration type in source code differs from that in the specification.
The update keeps the constant in a consistent way.
Issue 35When you install the security update that is described in the following Knowledge Base article, a Windows Communication Foundation (WCF) service is forcibly closed by the remote host. This problem occurs when the trust level is set to High or to Medium in the Web.config file of the WCF service.
Features that this update rollup package introducesThis update rollup package introduces the following features that are related to the .NET Framework 4.
Feature 1This update rollup enables ASP.NET to support multiple IIS configuration systems in a design mode. Therefore, Visual Studio Web Designer supports IIS Express. Additionally, Visual Studio Web Designer lets different Visual Studio Solution projects target different versions of IIS.
Feature 2When a shadow cache assembly that is turned into a symbolic link to the same file is validated, the size of the assembly is not checked. Therefore, ASP.NET uses Optimization for Shared Web Hosting.
Feature 3New syntax lets you define a TextBox control that is HTML5 compatible. For example, the following code defines a TextBox control that is HTML5 compatible:
<asp:TextBox runat="server" type="some-HTML5-type" />
Feature 4A new switch has been added for the Visual Basic compiler that allows libraries to remove their dependency on the Visual Basic runtime. In earlier versions of the .NET Framework, all Visual Basic applications automatically had a runtime dependency added. The dependency was with the Visual Basic Runtime library file, Microsoft.VisualBasic.dll. With this update, a command-line option can be set to remove this dependency. Some functionality of the Visual Basic Runtime is embedded in the application, and other functionality is no longer available when the switch is set.
Changes to the support portable libraries. These changes include API updates and binder modifications. This update enables the CLR to bind successfully to portable libraries so that a single DLL can run on the .NET Framework 4, on Silverlight, on Xbox, or on the Windows Phone. This update adds public Silverlight APIs to the .NET Framework 4 in the same location. The API signatures will remain consistent across the platform. All modifications are 100 percent compatible and will not break any existing code.
Prerequisites for this updateThe following list contains the prerequisites for the update:
- To apply this update, you must have the .NET Framework 4 or the .NET Framework 4 Client Profile installed.
- To install this update, you must have Windows Installer 3.1 or a later version installed. To obtain the latest version of Windows Installer, visit the following Microsoft website:
Command-line switches for this updateFor information about the various command-line switches that are supported by this update, see the following Windows Installer command-line switches document:
For more information about Windows Installer, visit the following Microsoft Developer Network (MSDN) website:
Restart requirementThis update does not require a system restart after you apply the update unless the files that are being updated are locked or are being used. However, this update restarts all Internet Information Services (IIS)-related services when you install this update.
Update replacement informationThis update replaces the following hotfixes:
2413613 A shortcut menu may appear far away from the mouse pointer when you run a Windows Presentation Foundation application that is based on the .NET Framework 4
2298853 FIX: Visual Studio 2010 error: "Error 1 error MSB4014: The build stopped unexpectedly because of an internal failure"
2461678 A .NET Framework 4-based WPF application crashes if the source object of a data binding in a control is an element that is defined outside the name scope of the control
Update detection informationThe v2 package of this Knowledge Base article creates the same detection keys as the v1 package. This is a known issue for this update. If your application has a dependency on the v2 version of this update, you can check the following registry subkeys, based on the .NET Framework 4 Profile that is installed on your computer. You can then determine whether the v2 version of the KB2468871 update is installed on your computer.
To do this, follow these steps:
- Click Start, click Run, type regedit, and then press ENTER.
- Locate, and then click one of the following registry subkeys, as appropriate for your operating system and architecture:
- For all supported x86-based versions of Windows, examine one of the following subkeys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4 Client Profile\KB2468871\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4 Extended\KB2468871\
- For all supported x64-based versions of Windows, examine one of the following subkeys:
HKEY_LOCAL_MACHINE\SOFTWARE\wow6432node\Microsoft\Updates\Microsoft .NET Framework 4 Client Profile\KB2468871\
HKEY_LOCAL_MACHINE\SOFTWARE\wow6432node\Microsoft\Updates\Microsoft .NET Framework 4 Extended\KB2468871\
- For all supported x86-based versions of Windows, examine one of the following subkeys: