Microsoft.Win32.RegistryKey.CreateSubKeyInternalCore C# (CSharp) Méthode

        private unsafe RegistryKey CreateSubKeyInternalCore(string subkey, bool writable, RegistryOptions registryOptions)
        {
            Interop.Kernel32.SECURITY_ATTRIBUTES secAttrs = default(Interop.Kernel32.SECURITY_ATTRIBUTES);
            int disposition = 0;

            // By default, the new key will be writable.
            SafeRegistryHandle result = null;
            int ret = Interop.Advapi32.RegCreateKeyEx(_hkey,
                subkey,
                0,
                null,
                (int)registryOptions /* specifies if the key is volatile */,
                (int)GetRegistryKeyRights(writable) | (int)_regView,
                ref secAttrs,
                out result,
                out disposition);

            if (ret == 0 && !result.IsInvalid)
            {
                RegistryKey key = new RegistryKey(result, writable, false, _remoteKey, false, _regView);
                if (subkey.Length == 0)
                {
                    key._keyName = _keyName;
                }
                else
                {
                    key._keyName = _keyName + "\\" + subkey;
                }
                return key;
            }
            else if (ret != 0) // syscall failed, ret is an error code.
            {
                Win32Error(ret, _keyName + "\\" + subkey);  // Access denied?
            }

            Debug.Fail("Unexpected code path in RegistryKey::CreateSubKey");
            return null;
        }