Unable to read registry: System.Security.SecurityException, Requested registry access is not allowed

问题

I'm getting reported errors from users who are receiving the error "System.Security.SecurityException, Requested registry access is not allowed." when trying to read the registry. I can't think why someone would not have permission to read the registry and I'm unable to reproduce the problem on my Windows 7 PC. Affected users are running .NET 4.0

Here's the C# code I'm using:

var baseReg = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32);
var key = baseReg.OpenSubKey(RegKey, RegistryKeyPermissionCheck.ReadSubTree);

if (key != null)
{
    var value = key.GetValue("DisableAutoUpdate", 0);
    if (value != null)
    {
        updatesDisabled = Convert.ToBoolean(value);
    }
}

EDIT: I've checked permissions on the registry key concerned for the affected user and standard Users have read permission for that key.

EDIT 2 and SOLUTION: According to the affected user, installing .NET 4.5.2 resolves the problem! I'm not sure why.

Thanks to @nozzleman's answer below this is fixed by forcing it to open the key as read-only. However it's odd that .NET 4.0 as 4.5.2 appear to behave differently.

回答1:

There is an overload of the OpenSubKey(..)-Method that allows to add a third parameter. You could try passing RegistryRights.ReadKey with that one and see if that solves the issue.

baseReg.OpenSubKey(
    RegKey, 
    RegistryKeyPermissionCheck.ReadSubTree
    RegistryRights.ReadKey);

Alternatively, try the other overload accepting 2 parameters like so

baseReg.OpenSubKey(RegKey, false);

This leads to opening the subkey readonly, and you dont neet to read the whole sub tree in the given szenario..

来源：https://stackoverflow.com/questions/31741599/unable-to-read-registry-system-security-securityexception-requested-registry-a

标签

registry

uac