I have written a C# Windows Forms application to merge the files and folders from a remote folder on one machine (‘source’ folder is a mapped drive – ‘Z:\folder’) with another remote folder on a different machine (‘destination’ folder is a UNC path to a shared folder – ‘\\computername\sharedfolder’). I have Full permissions to both folders. When I run the program on my local machine, it works fine, but when I try to run it from from within the source folder it fails with a security exception.
The failure occurs when calling the DirectoryInfo constructor for the destination folder (i.e., DirectoryInfo(@’\\computername\sharedfolder’). I assume the problem is because I am running the program from a mapped drive. Any workarounds?
The specific exception is: Request for the permission of type ‘System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089’ failed.
UPDATE
okay, I got my application into Visual Studio 2008 (it was previously coded in 2005), targeted the .NET 3.5 framework, compiled and tried again.
I got the exact same error.
UPDATE – RESOLUTION
I tried it with .NET 3.5, and it didn’t work, then I noticed that you said 3.5 SP1. The service pack is definately needed.
Problem solved. Thank you.
.NET 3.5 SP1 allows running applications off a network share. Previous versions did not allow it.