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Editorial Team
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Asked: 2026-05-26T13:23:15+00:00

I’m using VS2008 with MS Sql Server 2005 to create an application. I’ve used

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I’m using VS2008 with MS Sql Server 2005 to create an application.

I’ve used linq to query the database, and when I run the application from debug folder on my PC, it runs correctly, but when I copy the debug folder to another PC and try to run it an error message say that can not attach the database or can not find the database.

I have copied the database files into the same folder as the application DLLs, but how can I edit the config file at the debug folder to let the application attach the database from the same folder?

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  1. Editorial Team

    Put your database in a directory called App_Data and use the connection string like this :

    Server=.\SQLExpress;AttachDbFilename=|DataDirectory|mydbfile.mdf;
Database=dbname;Trusted_Connection=Yes;

    The final folder structure of the app will be like this : bin directory contains the compiled assemblies, and in the same level as bin folder have the App_Data folder and have the database inside this App_Data folder.

    Change SQLExpress to your database, and supply any username password etc if needed also. Look here for examples of good connection strings.

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