Bug Solutions
Real production bugs, root causes, and fixes — documented so others don’t repeat the same mistakes.
Resolved Bugs
Issues I encountered in real systems and how I fixed them
Fixing 'Object reference not set to an instance of an object' in ASP.NET
An MVC action threw a NullReferenceException while accessing RouteData values when a specific header was missing.
Debugging SQL Query Performance Bottlenecks
A report endpoint was timing out under load due to inefficient SELECT N+1 queries.
Other Debugging Notes
Handling Concurrency in C# with EF Core
Simultaneous edits caused overwrites in collaborative features.
Read note →Common Bug Areas
- ASP.NET Core & MVC
- Entity Framework Core
- SQL & performance
- Concurrency & threading
- Distributed systems
Debugging Philosophy
- Understand root cause, not symptoms
- Reproduce before fixing
- Measure performance, don’t guess
- Prefer simple, explainable fixes