public static function createFromConnectionString($connectionString)
    {
        $tokenizedSettings = self::parseAndValidateKeys($connectionString);

        $matchedSpecs = self::matchedSpecification(
            $tokenizedSettings,
            self::allRequired(
                self::$_subscriptionIdSetting,
                self::$_certificatePathSetting
            ),
            self::optional(
                self::$_endpointSetting
            )
        );
        if ($matchedSpecs) {
            $endpointUri = Utilities::tryGetValueInsensitive(
                Resources::SERVICE_MANAGEMENT_ENDPOINT_NAME,
                $tokenizedSettings,
                Resources::SERVICE_MANAGEMENT_URL
            );
            $subscriptionId = Utilities::tryGetValueInsensitive(
                Resources::SUBSCRIPTION_ID_NAME,
                $tokenizedSettings
            );
            $certificatePath = Utilities::tryGetValueInsensitive(
                Resources::CERTIFICATE_PATH_NAME,
                $tokenizedSettings
            );

            return new self(
                $subscriptionId,
                $endpointUri,
                $certificatePath
            );
        }

        self::noMatch($connectionString);
        return null;
    }