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FIX: Breakpoints are not hit when you debug a Visual Studio Add-in project that targets the .NET Framework 2.0 in Microsoft Visual Studio 2010 SP1
Article ID: 2591546 - View products that this article applies to.
Consider the following scenario:
In this scenario, the breakpoint that you set is not hit.
Note This problem does not occur when you use the release version of Microsoft Visual Studio 2010.
This problem occurs because Visual Studio treats the add-in as a .NET Framework 2.0-based application. However, the Devenv.exe configuration files force the application to load as a .NET Framework 4.0-based application. Therefore, Visual Studio debugs the application in the wrong runtime, and this causes the breakpoints not to be hit.
Important This hotfix is specifically for Visual Studio add-in projects. We do not recommend that you install this hotfix if you use Visual Studio to create Office add-in projects.
Hotfix informationA supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website:
http://support.microsoft.com/contactus/?ws=supportNote The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
PrerequisitesTo apply this hotfix, you must have Microsoft Visual Studio 2010 Service Pack 1 (SP1) installed.
Restart informationYou do not have to restart the computer after you apply this hotfix. We recommend that you exit any instances of Visual Studio, its applications, or any .NET Framework applications before you apply this hotfix. Otherwise, you must restart Visual Studio.
Hotfix replacement informationThis hotfix does not replace a previously released hotfix.
File informationThe global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Microsoft Visual Studio 2010 Service Pack 1
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To work around this problem, use one of the following methods:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about how to use breakpoints to debug a project, visit the following Microsoft Developer Network (MSDN) website:
Walkthrough: Debugging an Add-in projectFor more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/824684/ )Description of the standard terminology that is used to describe Microsoft software updates
Article ID: 2591546 - Last Review: November 14, 2011 - Revision: 1.0