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Before I pull out the rest of my hair I'd like to get some input on this. I'm trying to take ownership of a folder. I'm running the program as administrator of course and I do have rights to take ownership since I can change the owner in explorer. I can however change the owner if either administrator or my account owns it, and I can change permissions if I already have ownership. If I try to give myself ownership of a file, lets say owned by SYSTEM, then I get an unauthorizedexception. I've tried some different things with the accesscontrol methods but nothing works, this latest method I think is directly by the book. private static void makePerm(string file, NTAccount account) { FileInfo finfo = new FileInfo(file); FileSecurity fsecurity = finfo.GetAccessControl(); //also tried it like this //fsecurity.ResetAccessRule(new FileSystemAccessRule(string.Format(@"{0}\{1}", Environment.UserDomainName.ToString(), Environment.UserDomainName.ToString()), FileSystemRights.FullControl, AccessControlType.Allow)); fsecurity.SetOwner(account); finfo.SetAccessControl(fsecurity); } I'm trying this on Windows 7 btw. What am I missing here?

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