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Coding Droplets

@codingdropletsJoined April 2025

Build, Scale & Master .NET with Clean, Practical Tutorials

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Coding Dropletscodingdroplets.com329 posts

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CDCoding Dropletscodingdroplets.comSep 16 · 13 min read

How to Build Incremental RAG Indexing in .NET: A Real-World Walkthrough

Incremental RAG indexing is what separates a demo knowledge base from one you can still trust six months later. The first ingestion run is easy: read every document, chunk it, embed it, write it to a

CDCoding Dropletscodingdroplets.comSep 12 · 10 min read

How to Unit Test IChatClient in .NET Without Calling a Real Model

The first AI endpoint you ship is exciting. The first AI endpoint you try to unit test IChatClient against is where the excitement stops. Your test suite suddenly needs an API key, costs money per run

CDCoding Dropletscodingdroplets.comSep 11 · 11 min read

.NET Container OOMKilled in Kubernetes: Root Cause and Fix

The pod restarts at 3 AM. No exception, no stack trace, no shutdown log - the process is simply gone. kubectl describe pod tells the whole story in three lines: Last State: Terminated Reason:

CDCoding Dropletscodingdroplets.comSep 10 · 12 min read

Azure OpenAI Content Filter Errors in .NET APIs: Causes and Fixes

The first time an Azure OpenAI content filter error hit one of our production .NET APIs, it did not look like a content filter error at all. It looked like a flaky provider: a burst of 400 Bad Request

CDCoding Dropletscodingdroplets.comSep 9 · 11 min read

How to Stream Large CSV Exports in ASP.NET Core: A Real-World Walkthrough

Every internal API eventually grows an export endpoint, and it is almost always the same story. Somebody in finance asks for "the transactions as a spreadsheet", a developer adds GET /transactions/exp

Coding Droplets

About

Available for

Coding Droplets's blogs

Recently published

How to Build Incremental RAG Indexing in .NET: A Real-World Walkthrough

How to Unit Test IChatClient in .NET Without Calling a Real Model

.NET Container OOMKilled in Kubernetes: Root Cause and Fix

Azure OpenAI Content Filter Errors in .NET APIs: Causes and Fixes

How to Stream Large CSV Exports in ASP.NET Core: A Real-World Walkthrough

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Coding Droplets

About

Available for

Coding Droplets's blogs

Recently published

How to Build Incremental RAG Indexing in .NET: A Real-World Walkthrough

How to Unit Test IChatClient in .NET Without Calling a Real Model

.NET Container OOMKilled in Kubernetes: Root Cause and Fix

Azure OpenAI Content Filter Errors in .NET APIs: Causes and Fixes

How to Stream Large CSV Exports in ASP.NET Core: A Real-World Walkthrough