How to manually manage transactions?

Short answer: (BeginTransaction, Commit, Rollback) Use DbContext.Database.BeginTransaction() to start a transaction.

Explain a bit more

Call Commit() to save changes or Rollback() to undo. Useful for combining multiple operations that should succeed or fail as a unit. using var transaction = context.Database.BeginTransaction(); try { // Perform multiple operations context.SaveChanges(); transaction.Commit(); } catch { transaction.Rollback(); throw; }

Real-world example (ShopNest)

ShopNest’s order service uses EF Core to save an Order and its line items in one SaveChangesAsync() call inside a transaction.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.