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You can find a lot of debugging and deploying problems while developing applications in .NET and Visual Basic here. There are also some querying tips in SQL and typical source codes which might be useful shared here.

Cannot create/shadow copy when file already exists

Error : Cannot create/shadow copy '..........' when that file already exists.

Solution : Rebuild solution / Clean solution, then rebuild.

Don't know why this actually happens. But it happens often, after building solution without debugging for times.
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  1. kjpowers2 said...

    Occurred on a production server that was operating fine. Then this with no known changes.

  2. Steven Luck said...

    If you meet this problem while deploying, then the solution is restarting the IIS.

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