Unable to open registry subkey On windows 10 PC using C#

Question

I unable to open programmatically registry subkey on windows 10 PC.

I am getting exception by using below code.

using (RegistryKey keys = Registry.LocalMachine.OpenSubKey(a_Path, RegistryKeyPermissionCheck.ReadWriteSubTree, RegistryRights.FullControl))

{

// Doing some operation like reading some value

}

Exception:

Requested registry access is not allowed.

Can any body help me to come out.

Amit Gupta · Answer

Donot use any Registry permission check the mentioned key can be openned normaly without any overload using ( RegistryKey keys = Registry .LocalMachine.OpenSubKey(a_Path)) { //Read your subkeys here }

Sujeet Suman · Answer

Amit I am trying to open below Registry Sub Key. SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall

Amit Gupta · Answer

Then there might be problem with your overloading of reading all subkey tree there are some keys that are specially used by system and not available for other users for writing purpose Try this Using ( RegistryKey keys = Registry .LocalMachine.OpenSubKey(a_Path true)) True - if it required to write on the key else false. Can you share your value of a_path

Sujeet Suman · Answer

Dear I am already using this. requestedExecutionLevel level = asInvoker uiAccess = false /> but still I am getting exception. This issue coming on Windows-10 only. On other os it's working fine. Like Windows-7 Windows-xp Windows-8

Amit Gupta · Answer

For running your program in elevated mode you need to add a config file to give permission to that file. Check below link fyi https://stackoverflow.com/questions/2818179/how-do-i-force-my-net-application-to-run-as-administrator Moreover for security purpose Microsoft has implemented UAC for accessing and modifying sensitive information from Windows Vista. Hence it requires your program to run in an elevated mode for full permission​.

Sujeet Suman · Answer

First thanks Amit for your reply. I am agree with you. But in my pc (Windows 10 system) user having Full Control access right. So is there any way(through C#) to run my windows application as admin.

Amit Gupta · Answer

Hey Accessing registry key of local machine requires some permission try running your program as an administrator.