Azure Service Bus SDK for TypeScript Enterprise messaging with queues, topics, and subscriptions. Installation Environment Variables Authentication Core Workflow Send Messages to Queue Receive Messages from Queue Subscribe to Messages (Event-Driven) Topics and Subscriptions Message Sessions Dead-Letter Handling Scheduled Messages Message Deferral Peek Messages (Non-Destructive) Key Types Receive Modes Best Practices 1. Use Entra ID auth - Avoid connection strings in production 2. Reuse clients - Create once, share across senders/receivers 3. Close resources - Always close senders/receivers wh…