This content originally appeared on DEV Community and was authored by Vinayak Savale
In today’s world of distributed systems and microservices, one of the biggest challenges is ensuring reliable communication between applications.
That’s where Azure Service Bus comes into play. It’s a fully managed enterprise messaging service that helps: 
Decouple applications Improve scalability Build resilient communication pipelines
What is Azure Service Bus?
Think of Service Bus like a post office for your applications:
Applications send messages (letters) to Service Bus.
Service Bus stores them securely until the receiving service is ready.
Applications receive messages when they can process them.
This design provides: 
Loose coupling Fault tolerance Better scalability
Core Concepts
Namespace → A logical container grouping queues & topics.
Queues → Point-to-point messaging (one sender → one receiver). Follows FIFO order.
Topics & Subscriptions → Publish/Subscribe model. A single message can reach multiple subscribers. Perfect for event-driven systems.
Message → The basic unit of communication, including payload + metadata.
.NET Integration Example
Here’s how simple it is to send a message to a Service Bus queue using Azure SDK for .NET:
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Real-World Applications
Order Processing Systems → Decouple order placement from payment & inventory.
IoT Devices → Buffer messages from millions of devices before processing.
Event-driven Microservices → Publish once, let multiple services react.
Legacy Integration → Connect old on-premise apps with modern cloud systems.
Wrapping Up
Azure Service Bus provides the foundation for building reliable, scalable, and decoupled systems in the cloud.
Today we covered: What Service Bus is Why it’s important Core concepts (namespace, queues, topics) A simple .NET integration example
What’s your experience with messaging systems? Have you worked with Azure Service Bus, RabbitMQ, or Kafka? Drop your thoughts below 
This content originally appeared on DEV Community and was authored by Vinayak Savale