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Coding Droplets

@codingdropletsJoined April 2025

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

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Coding Dropletscodingdroplets.com309 posts

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CDCoding Dropletscodingdroplets.com21h ago · 10 min read

Token-Based Rate Limiting for AI Endpoints in ASP.NET Core: A Real-World Walkthrough

The first AI endpoint I put behind a rate limiter was protected by a policy that allowed 60 requests per minute per user. It felt responsible. Two weeks later one customer generated a bill larger than

CDCoding Dropletscodingdroplets.com1d ago · 9 min read

Customizing 401 Responses with JwtBearerEvents in ASP.NET Core

Every error your ASP.NET Core API returns is a documented, structured Problem Details payload. Except one. When a bearer token is missing, expired, or malformed, the client gets a 401 with an empty bo

CDCoding Dropletscodingdroplets.com2d ago · 8 min read

Migrating from the OpenAI SDK to Microsoft.Extensions.AI in .NET: A Step-by-Step Guide

Most .NET teams started their AI work the same way: install the official OpenAI package, call it directly from a service, ship it. That is exactly the right first move. The problem shows up six months

CDCoding Dropletscodingdroplets.com3d ago · 9 min read

Sending SignalR Messages to a Specific User in ASP.NET Core with IUserIdProvider

The requirement sounds trivial until you try it. A background job finishes and exactly one person needs to know, on whichever devices they happen to have open. The first instinct is to store connectio

CDCoding Dropletscodingdroplets.com4d ago · 10 min read

Redacting PII Before It Reaches the LLM in ASP.NET Core AI APIs

The prompt is the leak. Every other control in an AI feature gets scrutinised - authentication on the endpoint, authorization on the tools, validation of the model's output - while the one thing that

Coding Droplets

About

Available for

Coding Droplets's blogs

Recently published

Token-Based Rate Limiting for AI Endpoints in ASP.NET Core: A Real-World Walkthrough

Customizing 401 Responses with JwtBearerEvents in ASP.NET Core

Migrating from the OpenAI SDK to Microsoft.Extensions.AI in .NET: A Step-by-Step Guide

Sending SignalR Messages to a Specific User in ASP.NET Core with IUserIdProvider

Redacting PII Before It Reaches the LLM in ASP.NET Core AI APIs

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Coding Droplets

About

Available for

Coding Droplets's blogs

Recently published

Token-Based Rate Limiting for AI Endpoints in ASP.NET Core: A Real-World Walkthrough

Customizing 401 Responses with JwtBearerEvents in ASP.NET Core

Migrating from the OpenAI SDK to Microsoft.Extensions.AI in .NET: A Step-by-Step Guide

Sending SignalR Messages to a Specific User in ASP.NET Core with IUserIdProvider

Redacting PII Before It Reaches the LLM in ASP.NET Core AI APIs