Legacy .NET rescue: stabilize production first
Fix hangs, timeouts, starvation, and retries that duplicate work — with practical instrumentation and safe changes you can ship.
Lane A
Symptoms I fix
- • Background jobs hang forever
- • Thread pool starvation and slow APIs
- • Retry storms and duplicate side effects
- • “Works locally” but flakes in prod
What you get
A diagnosis ladder, minimal-risk fixes, and the exact logs/metrics to prevent the same outage next week.
Featured
Browse all
Performance triage in legacy .NET: find the top 3 bottlenecks fast
When the legacy system is slow and no one knows where to start, a structured triage finds the real bottlenecks in hours, not weeks. This playbook gives you a repeatable method to identify, rank, and fix the top 3 performance killers.
WebSocket Reconnection That Actually Works: Auto-Reconnect Guide for Trading Bots
Complete WebSocket auto-reconnect guide for trading bots. Implement automatic reconnection with exponential backoff, heartbeat ping-pong, message gap detection, and state recovery. Production-tested TypeScript code included.
Feb 25, 2026
Crash Recovery: Reconciliation Loops That Prevent Double Orders
Build crash-proof trading bots with reconciliation loops that detect and correct out-of-sync state on restart—preventing double orders and orphan positions.
Feb 23, 2026
Bybit error 10006: params timestamp illegal — why it happens and how to fix it
When Bybit returns error 10006 "params timestamp illegal": why your trading bot's requests are rejected, the difference from Binance -1021, and the clock sync that prevents it.
Jun 08, 2026
Binance error -1021: timestamp for this request is outside the recvWindow
When your trading bot flips from working to "timestamp for this request is outside the recvWindow": why Binance rejects valid signatures after clock drift, and the time calibration that prevents -1021.
Jun 07, 2026
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.NET rescue
C# 8 Default Interface Methods & Static Fields: Which Version? Complete Guide with Examples
Which C# version introduced default interface methods and static fields? C# 8.0. Complete reference covering static methods, fields, access modifiers, sealed/virtual members, CLR support, and production use cases with code examples.
Jun 16, 2026
Outbox pattern: reliable writes + events without the enterprise baggage
When a database write succeeds but the event never arrives, your system is lying to downstream consumers. The outbox pattern fixes this without a distributed transaction or a message broker rewrite.
Structured logging that actually helps: Serilog fields that matter in .NET incidents
When logs are noisy but useless: why incidents stay unsolved, which fields actually explain failures, and the minimal schema that makes .NET outages diagnosable.
OpenTelemetry for .NET: minimum viable tracing for production debugging
When incidents span multiple services and logs cannot explain latency: the smallest OpenTelemetry setup that makes production debugging possible without a full rewrite.
Idempotency keys for APIs: stop duplicate orders, emails, and writes
When retries create duplicate side effects, idempotency keys are the only safe fix. This playbook shows how to design keys, store results, and prove duplicates cannot recur.
Automation reliability
WebSocket closed with 1006: why trading bots lose connection without an error code
When WebSocket drops with 1006 abnormal closure and no close frame: why trading bots see 1006 instead of a clean close, and the reconnect strategy that handles it without guessing.
Trading bot keeps getting 429s after deploy: stop rate limit storms
When deploys trigger 429 storms: why synchronized restarts amplify rate limits, how to diagnose fixed window vs leaky bucket, and guardrails that stop repeat incidents.
API key suddenly forbidden: why exchange APIs ban trading bots without warning
When API key flips from working to 403 forbidden after bot runs for hours: why exchange APIs ban trading bots for traffic bursts, retry storms, and auth failures, and the client behavior that prevents it.
Jan 11, 2026
Signature invalid but bot was working: why clock drift breaks auth suddenly
When bot gets signature invalid or 401 after working fine for hours: why clock drift breaks exchange auth suddenly, and the time calibration that prevents it.
Why Most Crypto Trading Bots Fail (And How to Build One That Actually Works)
Discover why most crypto trading bots lose money and how to build a working, profitable bot with Python. Learn real-world lessons and get access to a 250+ page guide a…
Resources
All resourcesPerformance Triage Runbook for Legacy .NET
Step-by-step runbook to find the top 3 bottlenecks in legacy .NET applications—prioritized by quick-win vs. structural effort.
WebSocket Reconnection Kit
WebSocket manager template with automatic reconnection, gap detection, and state recovery for trading bots.
Axiom
Axiom Ops — reliability defaults + runbooks
A practical kit to stop loops, prevent duplicate side effects, and make failures obvious.
XConnect — turn X DMs into a real pipeline
A lightweight CRM + DM workflow inside X so you can capture prospects, organize leads, and send consistent follow-ups without losing context.
This week
Want help this week?
If you have a production incident, recurring timeouts, or jobs that get stuck overnight, I can help you stabilize first.
What we do in the first 48 hours
- • Confirm the failure mode + the repeat trigger
- • Add the minimum logs/metrics to prove the fix
- • Ship 1–2 safe changes that stop repeats
Latest Posts
C# 8 Default Interface Methods & Static Fields: Which Version? Complete Guide with Examples
Which C# version introduced default interface methods and static fields? C# 8.0. Complete reference covering static methods, fields, access modifiers, sealed/virtual members, CLR support, and production use cases with code examples.
WebSocket closed with 1006: why trading bots lose connection without an error code
When WebSocket drops with 1006 abnormal closure and no close frame: why trading bots see 1006 instead of a clean close, and the reconnect strategy that handles it without guessing.
Outbox pattern: reliable writes + events without the enterprise baggage
When a database write succeeds but the event never arrives, your system is lying to downstream consumers. The outbox pattern fixes this without a distributed transaction or a message broker rewrite.
Structured logging that actually helps: Serilog fields that matter in .NET incidents
When logs are noisy but useless: why incidents stay unsolved, which fields actually explain failures, and the minimal schema that makes .NET outages diagnosable.
Kamran Ul Haq
Founder & Lead Engineer
I help teams keep automation and .NET systems stable in production: stop duplicate side effects, fix retry storms, make failures observable, and ship guardrails fast. If you’re dealing with 429s, timeouts, runaway jobs, or “it fails but the logs don’t say why”, I’ll help you stabilize first and then harden so it stays fixed.
Most Popular
WebSocket Reconnection That Actually Works: Auto-Reconnect Guide for Trading Bots
Crash Recovery: Reconciliation Loops That Prevent Double Orders
C# 8 Default Interface Methods & Static Fields: Which Version? Complete Guide with Examples
Bybit error 10006: params timestamp illegal — why it happens and how to fix it
Binance error -1021: timestamp for this request is outside the recvWindow
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WebSocket Reconnection That Actually Works: Auto-Reconnect Guide for Trading Bots
Feb 25, 2026
Crash Recovery: Reconciliation Loops That Prevent Double Orders
Feb 23, 2026
C# 8 Default Interface Methods & Static Fields: Which Version? Complete Guide with Examples
Jun 16, 2026
Bybit error 10006: params timestamp illegal — why it happens and how to fix it
Jun 08, 2026
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