SQL Server :: Cannot Add MDF File To App_data

Sep 21, 2010

I'm using VS 2008 web developer express and SQL Server 2008 express. I created a few dbs using management studio and then created an App_Data Folder in the Web Developer. However, I cannot add the DBs that i created to the App_data folder. I navigated to C:Program FilesMicrosoft SQL ServerMSSQL10.SQLEXPRESSMSSQLDATA and tried to add the DB to the App_data folder. I get the following error:

"The File cannot be added because its being used by another process.

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