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Modernizing Legacy ASP.NET? Don't Fall Into the Task.Run Trap.
When you're building new async controllers and services but your repositories are still synchronous.
Don't wrap sync calls in Task.Run!
You'll burn two thread pool threads instead of one.
1. Use Task.FromResult to bridge the gap honestly.
2. Use the Adapter Pattern to keep a clean boundary.
3. Migrate repositories to truly async — one at a time.
Your new code should be async from day one. Your legacy code can catch up incrementally.
The key? Design async interfaces now, even if the first implementation behind them is synchronous. When the real async repo is ready, it's a one-line DI swap.
Legacy doesn't mean stuck. It means strategic.
#DotNet #ASPNETCore #CSharp #AsyncAwait #CleanArchitecture #SoftwareEngineering #LegacyModernization #BackendDevelopment #WebDevelopment #CodingTips:
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