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--- title: include file description: include file author: spelluru ms.service: azure-service-bus ms.topic: include ms.date: 06/19/2025 ms.author: spelluru ms.custom: - "include file" - sfi-ropc-nochange --- ## Prerequisites If you don't have an [Azure subscription](../../guides/developer/azure-developer-guide.md#understanding-accounts-subscriptions-and-billing), create a [free account](https://azure.microsoft.com/pricing/purchase-options/azure-account?cid=msft_learn) before you begin. ## Create a Service Bus namespace Follow instructions in this tutorial: [Quickstart: Use the Azure portal to create a Service Bus topic and subscriptions to the topic](../service-bus-quickstart-topics-subscriptions-portal.md) to do the following tasks: - Create a **premium** Service Bus namespace. - Get the connection string. - Create a Service Bus topic. - Create a subscription to the topic. You need only one subscription in this tutorial, so no need to create subscriptions S2 and S3. ## Send messages to the Service Bus topic In this section, you use a sample application to send messages to the Service Bus topic you created in the previous section. 1. Clone the [GitHub azure-service-bus repository](https://github.com/Azure/azure-service-bus/) or download the zip file and extract files from it. 1. In Visual Studio, go to the *\samples\DotNet\Azure.Messaging.ServiceBus\ServiceBusEventGridIntegrationV2* folder, and then open the *SBEventGridIntegration.sln* file. 1. In the **Solution Explorer** window, expand the **MessageSender** project, and select **Program.cs**. 1. Replace `<SERVICE BUS NAMESPACE - CONNECTION STRING>` with the connection string to your Service Bus namespace and `<TOPIC NAME>` with the name of the topic. ```csharp const string ServiceBusConnectionString = "<SERVICE BUS NAMESPACE - CONNECTION STRING>"; const string TopicName = "<TOPIC NAME>"; ``` 1. Build and run the program to send five test messages (`const int numberOfMessages = 5;`) to the Service Bus topic. :::image type="content" source="./media/service-bus-event-grid-prerequisites/console-app-output.png" alt-text="Screenshot shows the console app output, sending 5 messages.":::