# Azure Service Bus Send/Reply Sample


## Prerequisites

An environment variable named `AzureServiceBus_ConnectionString` with the connection string for the Azure Service Bus namespace.

## Code walk-through

This sample shows a basic two-endpoint scenario exchanging messages with each other so that:

* `Endpoint1` sends a `Message1` message to `Endpoint2`.
* `Endpoint2` replies to `Endpoint1` with a `Message2` instance.

### Transport configuration

<!-- snippet: config -->

```cs
var endpointConfiguration = new EndpointConfiguration("Samples.ASBS.SendReply.Endpoint1");
endpointConfiguration.EnableInstallers();

var connectionString = Environment.GetEnvironmentVariable("AzureServiceBus_ConnectionString");
if (string.IsNullOrWhiteSpace(connectionString))
{
    throw new Exception("Could not read the 'AzureServiceBus_ConnectionString' environment variable. Check the sample prerequisites.");
}

var transport = new AzureServiceBusTransport(connectionString, TopicTopology.Default);
endpointConfiguration.UseTransport(transport);
endpointConfiguration.UseSerialization<SystemJsonSerializer>();
```

<!-- endsnippet -->

## Viewing messages in-flight

The following queues for the two endpoints can be seen in the Azure Portal or a third-party tool:

* `samples.asbs.sendreply.endpoint1`
* `samples.asbs.sendreply.endpoint2`
* `error`