Two withdrawals read the same balance and both succeed: that's a race condition. Three ways to stop it in EF Core (rowversion, an atomic update, and a row lock) and when to use each.
Shared Windows hosting with Plesk runs ASP.NET Core fine once you know the moving parts: the hosting bundle, the app pool, web.config, app_offline.htm, environment variables and folder permissions. A checklist that gets a .NET 10 app live.
A practical workflow for building a real ASP.NET Core site with Claude Code: write the brief first, scaffold with templates, work in small reviewed steps, encode rules as tests, and deploy in the first week.
Every night, compare what your ledger says happened with what the payment gateway says happened. A small, testable reconciler plus a BackgroundService turns days of manual checks into one log line.
