What does "Unatuthorized zone" mean when browsing xsd files with Visual Studio 2010?

Posted by starskythehutch on Stack Overflow See other posts from Stack Overflow or by starskythehutch
Published on 2010-05-27T08:15:39Z Indexed on 2010/05/27 8:21 UTC
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When I open up an xsd file that includes other xsd files, all of the included files are added to a section called "Unauthorized zone". Visual Studio highlights the element and gives the following error when trying to resolve the schemaLocation attribute:

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

I've read the following blog post, but I'm not familiar enough with xsd yet to fully understand it.

Can anyone explain why this is happening or point me to a good resource that can help?

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