How to poll/consume for new Kafka Messages

Poll/Consume for new messages / events. Blocks until a consume result is available or the timeout period has elapsed.

static void Consume(ConsumerBuilder<string, string> builder, string topic)
{
    bool run = true;
    var consumer = builder.Build();
    consumer.Subscribe(topic);

    Console.CancelKeyPress += (p, e) =>
    {
          run = false;
          consumer.Unsubscribe();
          consumer.Close();
          consumer.Dispose();
     };
    while (run){
        consumer.Consume(TimeSpan.FromSeconds(1));
    }
}

Control the fetch behavior

var consumerConfig = new ConsumerConfig
{
     FetchMinBytes = 1, //Default value
     FetchWaitMaxMs = 500 ,//Default value
     MaxPartitionFetchBytes = 1048576, //Default value, so 1 MB
     FetchMaxBytes = 52428800, //Default value, so 50 MB
     MaxPollIntervalMs = 300000 //Default value
};

FetchMinBytes : specify the minimum amount of data to receive from the broker when fetching records.
FetchWaitMaxMs : broker blocks before answering the fetch request of there is no sufficient data to satisfy the requirement given by FetchMinBytes.
MaxPartitionFetchBytes : maximum amount data per partition the server returns.
FetchMaxBytes : maximum data returned for each request.
MaxPollIntervalMs : setting does not impact the behavior, but consumer will cache records from each fetch request and returns records incrementally from each poll.