Section 4 of 6 Business case
Spaghetti code already in production
Most .NET estates are not a greenfield demo. They are eight years of features, three teams, a “temporary” module that became checkout, and a release freeze because nobody is sure what that class does. That is exactly where ArgusLogs pays off.
What “just add logging” really means on spaghetti
The methods that fail in production are the ones nobody wants to open. They have side effects, hidden statics, and no tests. Asking the team to instrument them by hand is asking them to rewrite the riskiest code under time pressure.
- You cannot stop production to clean the architecture first.
- A rewrite “for observability” competes with revenue work and usually loses.
- Profilers and APM agents add runtime weight and still will not explain a private helper that swallows exceptions.
- Partial Serilog coverage gives a false sense of safety: the logged 20% looks healthy while the dark 80% is on fire.
What ArgusLogs does instead
You mark the messy types. At build time the weaver inserts enter, exit, and exception telemetry around the methods that already run. You do not restack the spaghetti. You turn the lights on.
- No need to understand the whole class before you get a trace of what it did.
- Parameters and return values show the real data flowing through the knot — the data support tickets cannot describe.
- Duration tells you which ancient method is the actual bottleneck, so you refactor the one that matters.
- You can do this module by module. Ship visibility this sprint; clean the design when the business can afford it.