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FIX: The IntelliSense feature for a Visual C# .NET project stops working in the Visual Studio .NET IDE

This article has been archived. It is offered "as is" and will no longer be updated.
After you have performed a command-line build of a project that you created by using Microsoft Visual C# .NET, the Microsoft IntelliSense feature for the project does not work when you open the project in the Microsoft Visual Studio .NET 2003 IDE.
When you run a command-line build on a project that was created by using Visual C# .NET, the file that the Visual Studio .NET IDE uses to provide the IntelliSense feature for the project is populated incorrectly. The next time that you open the project in the Visual Studio .NET IDE, the IntelliSense feature does not work because the Visual Studio .NET IDE cannot interpret the data in this file.
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Visual Studio .NET 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
   Date         Time   Version      Size     File name   -------------------------------------------------------   09-Mar-2004  17:39  7.10.4069.0  794,624  Cslangsvc.dll
The Visual Studio .NET IDE uses the .projdata file to provide the IntelliSense feature for the project. This file is a hidden file. It is located in the Project Name\Debug folder of the project. To work around this problem, delete the .projdata file. For example, if your project is named MyProj, delete the following file:
After you delete the .projdata file, the Visual Studio .NET IDE recreates it automatically.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.
For additional information about the terminology that is used to describe Microsoft product updates, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Article ID: 838470 - Last Review: 12/08/2015 06:37:35 - Revision: 2.1

Microsoft Visual Studio .NET 2003 Enterprise Architect, Microsoft Visual Studio .NET 2003 Enterprise Developer, Microsoft Visual Studio .NET 2003 Academic Edition

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