C#开发中如何处理分布式事务和消息传递问题及解决方法

public async Task UpdateOrder(Order order)
{
    using (var dbContext = new ApplicationDbContext())
    {
        dbContext.Orders.Attach(order);
        dbContext.Entry(order).Property(p => p.Version).OriginalValue = order.Version;
        dbContext.Entry(order).Property(p => p.Version).CurrentValue++;
        dbContext.Entry(order).Property(p => p.Status).IsModified = true;

        try
        {
            await dbContext.SaveChangesAsync();
        }
        catch (DbUpdateConcurrencyException)
        {
            // Handle concurrency exception
        }
    }
}

public void PlaceOrder(Order order)
{
    using (var scope = new TransactionScope())
    {
        // PerfORM database operations

        var messageSession = await Endpoint.Start(new EndpointConfiguration
        {
            // Configuration options for NServiceBus
        });

        await messageSession.SendLocal(new ProcessOrderCommand
        {
            // Command properties
        });

        scope.Complete();
    }
}

public void SendMessage(string message)
{
    var factory = new ConnectionFactory
    {
        HostName = "localhost",
        UserName = "guest",
        PassWord = "guest"
    };

    using (var connection = factory.CreateConnection())
    using (var channel = connection.CreateModel())
    {
        channel.QueueDeclare(queue: "myQueue",
                             durable: true,
                             exclusive: false,
                             autoDelete: false,
                             arguments: null);

        var body = Encoding.UTF8.GetBytes(message);

        var properties = channel.CreateBasicProperties();
        properties.Persistent = true;

        channel.BasicPublish(exchange: "",
                             routingKey: "myQueue",
                             basicProperties: properties,
                             body: body);
    }
}

public void ProceSSMessage(Message message)
{
    var messageId = message.Id;

    using (var redis = ConnectionMultiplexer.Connect("localhost"))
    {
        var db = redis.GetDatabase();

        if (!db.SetAdd("processedMessages", messageId))
        {
            // Skip processing duplicate message
            return;
        }

        // Process the message
    }
}