private static void ValidateInputs(string connectionString, string topicName, string subscriptionName, IRetryPolicy retryPolicy) { connectionString.GuardArgumentIsNotNullOrEmpty(nameof(connectionString)); topicName.GuardArgumentIsNotNullOrEmpty(nameof(topicName)); subscriptionName.GuardArgumentIsNotNullOrEmpty(nameof(subscriptionName)); retryPolicy.GuardArgumentIsNotNull(nameof(retryPolicy)); }