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User Environment variables are separate for each user account on machine.
Consider the following, I’m logged in with userA which is non admin user account, now I want to get/set other user’s (say userB) environment variable by using C# application running in userA‘s context.
Is this possible to do? And if so, how could I do this?
The environment variables are stored in the registry, so to change them for another user you would have to import their registry hive.
The key for user vars is
HKEY_CURRENT_USER\Environmentand the key for system vars is
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\EnvironmentSo if you import the current user hive you can change it for other users, or for machine vars change the
HKLMkey from any admin account.This is messy though and I wouldn’t advise you do it.
Or you can use some P/Invoke to use Impersonation.