Debugging Production and Performance Issues in .NET — A Practical Guide

Application Insights, structured logging, SQL query plans, ILogger, BenchmarkDotNet, pagination vs full-table fetch, memory dumps Production bugs and performance problems are different from development bugs. You cannot attach a debugger. You have limited visibility. The system is under real load. And in many cases, the issue is not an exception — it's slow code, a memory leak, or a database query that works fine with 100 rows but falls apart with 4 million. Part 1: Debugging Production Issues St