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Editorial Team
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Asked: 2026-06-08T18:41:59+00:00

I have an application that is designed to manage a small company at www.example.com.

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I have an application that is designed to manage a small company at http://www.example.com. We also have a demo site that potential clients can go to see how the system works at http://www.example.com/demo. The example.com site works flawlessly, but when trying to read/write a file that is located at http://www.example.com/demo/fileHere through the demo system, I keep receiving this error:

[SecurityException: Request for the permission of type System.Security.Permissions.FileIOPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.]

I have tried changing the app.config app settings to:

<appSettings file="./demo" />

…but this did not fix it.

Any solutions or help would be greatly appreciated.
I’m trying to avoid giving the demo site its own domain.

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1 Answer

  1. Editorial Team

    You are receiving that exception because your executing assembly does not have permission to read/write at the desired location.

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