Unable to delete subkey tree in c#

Whenever I run the code below it throws an exception that the subkey does not exist though it actually exists. Am I doing something incorrectly? The purpose is to delete subkeys under a registry key recursively. My visual studio is running on x64:

string registryKey = @"Software\Google\Chrome";
RegistryKey hkcuChrome = Registry.CurrentUser.OpenSubKey(registryKey, writable: true);
        string[] hkcu_subkeys = hkcuChrome.GetSubKeyNames();
        if (hkcuChrome != null)
        {
            for (int i = 0; i < hkcu_subkeys.Length; i++)
            {
                hkcuChrome.DeleteSubKeyTree(hkcu_subkeys[i]);

            }
        }

        hkcuChrome.Close();