.NET security bites back

I was running a .NET app, and all it did was say:

Request for the permission of type System.Security.Permissions.FileIOPermission, mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 failed.
Request for the permission of type System.Security.Permissions.FileIOPermission, mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 failed.

After I hit Ok, the app crashed with an exception. I didn’t write it. Others could run it, I couldn’t. What was I doing wrong?

I was running the exe from a network share. Copying the exe to local fixed the problem.

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2 thoughts on “.NET security bites back

  1. daniel

    Did you have write access on the network share? Did the other people? Was it trying to write something?

    Gotta love a nice, meaningful error message.

  2. josh Post author

    I had write access, as did others. I don’t know if they were running it off the share; I don’t think so. I think it was trying to read a file from the share. I was not logged into a domain, I was connected to a Samba share. I don’t think any of this helped. But, power to the internet, a little Googling suggested (implicitly, not explicitly) the solution.

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