What is SqlDependency in .NET?

SqlDependency lets .NET apps get instant notifications from SQL Server on query result changes, using Service Broker—no polling required.

Does SqlDependency work with Azure SQL Database?

Limited; Service Broker's not fully supported in basic tiers. Use Premium or consider alternatives like Azure SQL Change Notifications.

SqlDependency vs polling: which is better for real-time apps?

SqlDependency crushes polling on efficiency and speed for SQL Server setups. Switch unless your queries are too wild.

🗄️ Databases & Backend

SqlDependency in .NET: Ditch Polling, Let SQL Server Ring the Doorbell

Your .NET app doesn't need to beg SQL Server for updates—SqlDependency makes the database shout when data changes. It's efficient, real-time, and criminally underused.

theAIcatchup Apr 10, 2026 4 min read

SqlDependency workflow: .NET app receives real-time push from SQL Server on data change

⚡ Key Takeaways

SqlDependency replaces wasteful polling with SQL Server push notifications via Service Broker. 𝕏
Strict query rules ensure determinism but limit complex ops—perfect for simple watchers. 𝕏
Underused gem; poised for revival as real-time needs grow without extra infrastructure. 𝕏

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theAIcatchup

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#.NET #Query Notifications #SQL Server #Service Broker #SqlDependency

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