dotnet add package RocketMQ.Client --version 5.2.0-rc1

using System.Text;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using Org.Apache.Rocketmq;
namespace examples
{
    internal static class ProducerNormalMessageDemo
    {
        static readonly ILoggerFactory factory = LoggerFactory.Create(builder => builder.AddConsole());
        static ILogger logger = factory.CreateLogger("Program_Producer");
        internal static async Task QuickStart()
        {
            // Enable the switch if you use .NET Core 3.1 and want to disable TLS/SSL.
            AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
            const string accessKey = "yourAccessKey";
            const string secretKey = "yourSecretKey";


            // Credential provider is optional for client configuration.
            var credentialsProvider = new StaticSessionCredentialsProvider(accessKey, secretKey);
            const string endpoints = "Tencent Cloud official website access address:8080";
            var clientConfig = new ClientConfig.Builder()
                .SetEndpoints(endpoints)
                .SetCredentialsProvider(credentialsProvider)
                .Build();


            const string topic = "topicName";
            // In most case, you don't need to create too many producers, single pattern is recommended.
            // Producer here will be closed automatically.
            var producer = await new Producer.Builder()
                // Set the topic name(s), which is optional but recommended.
                // It makes producer could prefetch the topic route before message publishing.
                .SetTopics(topic)
                .SetClientConfig(clientConfig)
                .Build();


            // Define your message body.
            var bytes = Encoding.UTF8.GetBytes("foobar");
            const string tag = "yourMessageTagA";
            var message = new Message.Builder()
                .SetTopic(topic)
                .SetBody(bytes)
                .SetTag(tag)
                // You could set multiple keys for the single message actually.
                .SetKeys("yourMessageKey-7044358f98fc")
                .Build();


            var sendReceipt = await producer.Send(message);
            logger.LogInformation($"Send message successfully, messageId={sendReceipt.MessageId}");


            // Close the producer if you don't need it anymore.
            await producer.DisposeAsync();


        }
    }
}

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using Org.Apache.Rocketmq;


namespace examples
{
    internal static class SimpleConsumerExample
    {
        static readonly ILoggerFactory factory = LoggerFactory.Create(builder => builder.AddConsole());
        static ILogger logger = factory.CreateLogger("Program_Consumer");
        internal static async Task QuickStart()
        {
            // Enable the switch if you use .NET Core 3.1 and want to disable TLS/SSL.
            AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);
            const string accessKey = "yourAccessKey";
            const string secretKey = "yourSecretKey";


            // Credential provider is optional for client configuration.
            var credentialsProvider = new StaticSessionCredentialsProvider(accessKey, secretKey);
            const string endpoints = "rmq-xxx.rocketmq.gz.qcloud.tencenttdmq.com:8080"; // Tencent Cloud access point.
            var clientConfig = new ClientConfig.Builder()
                .SetEndpoints(endpoints)
                .SetCredentialsProvider(credentialsProvider)
                .Build();


            // Add your subscriptions.
            const string consumerGroup = "yourConsumerGroup";
            const string topic = "yourTopic";
            var subscription = new Dictionary<string, FilterExpression>
                { { topic, new FilterExpression("*") } };
            // In most case, you don't need to create too many consumers, single pattern is recommended.
            var simpleConsumer = await new SimpleConsumer.Builder()
                .SetClientConfig(clientConfig)
                .SetConsumerGroup(consumerGroup)
                .SetAwaitDuration(TimeSpan.FromSeconds(15))
                .SetSubscriptionExpression(subscription)
                .Build();


            while (true)
            {
                var messageViews = await simpleConsumer.Receive(16, TimeSpan.FromSeconds(15));
                foreach (var message in messageViews)
                {
                    logger.LogInformation(
                        $"Received a message, topic={message.Topic}, message-id={message.MessageId}, body-size={message.Body.Length}");
                    await simpleConsumer.Ack(message);
                    logger.LogInformation($"Message is acknowledged successfully, message-id={message.MessageId}");
                    // await simpleConsumer.ChangeInvisibleDuration(message, TimeSpan.FromSeconds(15));
                    // Logger.LogInformation($"Changing message invisible duration successfully, message=id={message.MessageId}");
                }
            }
            // Close the simple consumer if you don't need it anymore.
            // await simpleConsumer.DisposeAsync();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using Org.Apache.Rocketmq;

namespace examples
{
    public class PushConsumerExample
    {
        private static readonly ILogger Logger = MqLogManager.CreateLogger(typeof(PushConsumerExample).FullName);

        private static readonly string Endpoint = Environment.GetEnvironmentVariable("ROCKETMQ_ENDPOINT");

        internal static async Task QuickStart()
        {
            const string accessKey = "yourAccessKey";
            const string secretKey = "yourSecretKey";
            // Enable the switch if you use .NET Core 3.1 and want to disable TLS/SSL.
            // AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);

            // Credential provider is optional for client configuration.
            var credentialsProvider = new StaticSessionCredentialsProvider(accessKey, secretKey);
            const string endpoints = "rmq-xxx.rocketmq.gz.qcloud.tencenttdmq.com:8080"; // Tencent Cloud access point.
            var clientConfig = new ClientConfig.Builder()
                .SetEndpoints(Endpoint)
                .SetCredentialsProvider(credentialsProvider)
                .Build();

            // Add your subscriptions.
            const string consumerGroup = "yourConsumerGroup";
            const string topic = "yourTopic";
            var subscription = new Dictionary<string, FilterExpression>
                { { topic, new FilterExpression("*") } };

            var pushConsumer = await new PushConsumer.Builder()
                .SetClientConfig(clientConfig)
                .SetConsumerGroup(consumerGroup)
                .SetSubscriptionExpression(subscription)
                .SetMessageListener(new CustomMessageListener())
                .Build();

            Thread.Sleep(Timeout.Infinite);

            // Close the push consumer if you don't need it anymore.
            // await pushConsumer.DisposeAsync();
        }

        private class CustomMessageListener : IMessageListener
        {
            public ConsumeResult Consume(MessageView messageView)
            {
                // Handle the received message and return consume result.
                Logger.LogInformation($"Consume message={messageView}");
                return ConsumeResult.SUCCESS;
            }
        }
    }
}