Tutorials ADO.NET Core Tutorial
Distributed Transactions — Complete Guide
Distributed Transactions — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of ADO.NET Core Tutorial on Toolliyo Academy.
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ADO.NET Core Tutorial · Lesson 37 of 100
Distributed Transactions
Foundations ✓ → SQL & safety → Production → Projects
SQL & safety · 2 — Procs, tx, performance · ~6 min · Module 4: Transactions and Error Handling
What is this?
Distributed transactions span multiple resources (DTC). Prefer sagas/outbox over MSDTC in modern ShopNest cloud apps.
Why should you care?
Cross-DB ACID is fragile in microservices — design around it.
See it live — copy this example
Use a .NET console or API project with SQL Server LocalDB. Run dotnet run after pasting.
// Prefer: local SqlTransaction + outbox event
Console.WriteLine("local tx: insert order + outbox");
Console.WriteLine("avoid TransactionScope across SQL+HTTP when possible");What happened?
- TransactionScope can enlist SQL, but cloud/microservice guidance favors local tx + messages.
- Know DTC exists for legacy.
Practice next
- build local tx + outbox sketch.
- Avoid HTTP inside TransactionScope.
- Document legacy DTC only if required.
- Write order+outbox sample.
- List why DTC hurts in K8s.
Remember
Prefer local + saga. DTC is legacy-heavy. Keep boundaries clear.
ShopNest avoids DTC
Checkout uses local tx + outbox.
Outcome: No DTC dependency in cloud.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
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