StructureMap, IIS 7.5 and FileIOException

Question

Howdy all. I am trying to solve a problem which is apparently not uncommon and I'm not sure how to find how this was resolved for folks. When I run StructureMap on my machine through IIS I get an exception and it looks like this:

**Description**: The application attempted to perform an operation not allowed by the security policy.  To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.
**Exception Details**: System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

This question has come up here at SO (https://stackoverflow.com/questions/784666/), in the comments on this blog post and a year or so ago on the structuremap mailing list.

My problem is not running it in a foreign hosting environment. I can't even get it to run on my own box (IIS 7.5, Win7 RC, .NET 3.5). I have tried to configure the site to use a custom policy file and the FileIOPermission is marked to have unrestricted access...no dice. If anyone has some tips or a link it would be greatly appreciated.

Update So there is no way that this is the best way to solve the problem, but after digging around and looking into what Joshua mentioned, these are the things I had to do to get it working: StructureMap, Code Access Security and a Bad Solution to a Problem. A better solution would be appreciated.

Answer 1

For what it's worth, I ran into this same issue where I had full control over the box and even set all the permissions to full trust. With IIS 7.5, I had to change the identity used for the specific application pool to NetworkService instead of ApplicationPoolIdentity. Once I restarted IIS, it worked.

Answer 2

FYI, I'm using StructureMap v2.6.1 and ran into this issue.

I do not use an XML configuration, so I added the following line to my configuration code, which fixed the problem.

IgnoreStructureMapConfig = true;