This is driving me batty.  Why is this piece of code repeatedly
throwing an "access to registry key is denied exception"?

This is a small console application that is being run on Vista.  I
fire up a command prompt (which is NOT running as an administrator)
and when I launch this app the above exception is promptly thrown.  Am
I not granting sufficient permissions to the logged on user before
performing OpenSubKey?

string _loggedOnUser = Environment.UserDomainName + "\\" +
Environment.UserName;
RegistrySecurity _regSecurity = new RegistrySecurity();
RegistryAccessRule accessRule =
                   new RegistryAccessRule(_loggedOnUser,

RegistryRights.ReadKey | RegistryRights.WriteKey |
RegistryRights.Delete,

InheritanceFlags.ContainerInherit,

PropagationFlags.InheritOnly,

AccessControlType.Allow);
_regSecurity.AddAccessRule(accessRule);
_regKey.CreateSubKey(@"SOFTWARE\MySubKey",
RegistryKeyPermissionCheck.ReadWriteSubTree, _regSecurity);

The above code in real life is sitting within a static constructor of
a static class but I guess that is irrelevant.