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🧠 Building RAG in .NET with Local Embeddings — 3 Approaches, Zero Cloud Calls
Hi! 👋 One of the questions I get most often is: “Bruno, can I build a RAG (Retrieval-Augmented Generation) app in .NET without sending my data to the cloud?” The answer is a resounding YES. 🚀 In this post, I’ll walk you through three different ways to build RAG applications using ElBruno.LocalEmbeddings — a .NET library that generates text embeddings locally using ONNX… — read more
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Building GitHub Copilot Agents in C# with Microsoft Agent Framework
GitHub Copilot just crossed a very interesting line. It’s no longer “just” helping you write code — it can now run as an agent, with goals, tools, and autonomy, using Microsoft Agent Framework (MAF). 🎥 Watch the full video here: In the video, I walk through three simple C# samples showing how Copilot can be… — read more
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Building an MCP App with C# – A Color Picker Sample
Hi! I’ve been spending some airport time playing with MCP Apps, and one question kept coming back: Can we build a real, interactive UI for MCP tools… using just C#? Short answer: yes.Long answer: let’s build one. In this post, we’ll create a Color Picker MCP App using ASP.NET Core + Model Context Protocol, where:… — read more
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Trick to fix DevUI Workflow Errors in Microsoft Agent Framework
Hi! How a Missing Workflow Name Breaks DevUI (and How to Fix It) When working with Microsoft Agent Framework and DevUI, I ran into a subtle but very frustrating issue: everything compiled, but DevUI failed at runtime. No workflows visible.No clear hint in the UI.And a runtime exception that didn’t immediately point to the real… — read more
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Fixing OllamaSharp Timeouts in C# (with a Simple Extension and just for fun 😄)
Hi! Avoid reading the blog post with this 5-min video: When working with local models in OllamaSharp, I hit a timeout while running long-running workloads like video analysis. The issue wasn’t the model, it was the default 100-second timeout coming from HttpClient. The problem By default, OllamaSharp uses an HttpClient with a fixed timeout.If your… — read more
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Building Multi-Agent Workflows in .NET with AgentFactory and Handoff
🎥 Video coming soon!I’m preparing a short walkthrough video where I’ll run this sample live, explain the design decisions, and show how everything fits together step by step. But hey, it’s christmas time, so I’m taking this easy 😉 When building AI-powered applications, the moment you move beyond a single “chatbot”, things get interesting very… — read more
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🤖 Local AI Power: Vision and Function Calling with Microsoft Agent Framework and Ollama
Hola friends! One of the questions I get most often lately is: “Bruno, can I run a full-featured agent locally without sending everything to the cloud?” The answer is a resounding YES. 🚀 Today, I want to show you how to use the new Microsoft Agent Framework to build a local agent that doesn’t just… — read more
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Claude in Azure with .NET – Anthropic Claude + Microsoft Extensions.AI (MEAI) 💥
Hi👋Great news for .NET developers: Anthropic’s Claude models (Claude Sonnet 4.5, Haiku 4.5, Opus 4.1) are now available in Microsoft Foundry (public preview anthropic.com). This makes Azure the only cloud platform providing access to both OpenAI’s GPT and Anthropic’s Claude frontier models side-by-side (azure.microsoft.com). In practical terms, you can deploy a Claude model to your… — read more
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Introducing the Microsoft Agent Framework – A Dev-Friendly Recap
Hi there! 👋 If you’ve been keeping an eye on the AI developer world, you might have heard about the Microsoft Agent Framework. This is a brand-new (as of late 2025) open-source SDK and runtime from Microsoft that makes it much easier to build and orchestrate AI agents – including scenarios with multiple agents working… — read more
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💭Claude in Azure, the .NET Way: elbruno.Extensions.AI.Claude v0.1.0-preview.2
elbruno.Extensions.AI.Claude just landed on NuGet with dual authentication support, polished samples, and drop-in compatibility with Microsoft.Extensions.AI. Here’s a fast tour so you can start shipping Azure+Claude powered experiences immediately. Highlights Install Once Sample 1 Default Azure Credentials Keep secrets in Azure and let DefaultAzureCredential figure out the right token. Minimal config: Sample 2 API Key Mode Need to run… — read more
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Using Claude Models in Microsoft Foundry with Microsoft.Extensions.AI (temp fix 😏)
Hi! This post demonstrates how to use Anthropic’s Claude models deployed in Microsoft Foundry with the Microsoft.Extensions.AI (MEAI) framework. Since official SDK support for Claude models in MEAI is not yet available, this sample shows a practical approach to bridge the gap between OpenAI’s API format (used by MEAI) and Claude’s native Anthropic API format.… — read more
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🚀 AG-UI + Agent Framework + .NET + Aspire: Web-Enabling Your Intelligent Agents (Blog + Demo + Code!)
📺 VIDEO COMING SOON — stay tuned!(I’ll embed the YouTube player here as soon as the video goes live.) Hola friends! Bruno here 🙋♂️ — Cloud Advocate at Microsoft, lover of .NET, AI, Blazor, and the occasional dog-walk debugging session with ACE 🐶. Today we’re diving into something very cool for .NET AI developers:👉 How… — read more
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🚀 Supercharging .NET Apps with DevUI and the New Microsoft Agent Framework
Hi! If you’re building intelligent applications in .NET, the new Microsoft Agent Framework opens the door to agent-based architectures, message-driven reasoning, and multi-agent collaboration. But one of the most powerful pieces of the ecosystem is DevUI—a visual debugging and tracing experience to see your agents think. In my latest video, I break down how DevUI… — read more
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🧠 Build an Agent Chat that Remembers — Persisting Conversations with Microsoft Agent Framework
Hi! Have you ever built a chat app where your AI completely forgets what you said five seconds ago? 😅That’s where persisted threads come in. In this post, we’ll explore how the new Microsoft Agent Framework for .NET lets you create agents that remember — across multiple interactions, sessions, or even app restarts. And yes,… — read more
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🧠 Never Lose Your AI Agent’s Train of Thought: Background Responses in .NET
Hi! Picture this: You’re building an AI-powered application. Your agent starts generating a detailed response—maybe a research summary, a long-form article, or complex code. Then… the network hiccups. Or the user closes their laptop. Or maybe they just need to ask a quick follow-up question before the agent finishes. In most scenarios, you’re toast. The… — read more
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From PDFs to Markdown in Seconds: FastAPI + MarkItDown + .NET (in Docker)
Hi! f you work with LLMs, you want structured text—not mystery meat. Here’s a tiny FastAPI service that wraps Microsoft’s MarkItDown to convert PDFs, Word, PPTs, and more into clean Markdown. We’ll run it in Docker and drive it with a C# console app. Watch the video here: Repo & Upstream Prereqs Run the Server… — read more
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🧠 Taking Multi-Model AI Orchestration Further: Azure AI Foundry Persistent Agents in .NET 9
Hi! In my previous post, I showed you how to orchestrate multiple AI agents using the Microsoft Agent Framework, connecting Azure AI Foundry (OpenAI), GitHub Models, and Ollama in a single .NET 9 application. Today, I’m taking this a step further by introducing Azure AI Foundry Persistent Agents—a powerful feature that allows you to create, manage, and… — read more
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🧠 Build AI Agents in C# with the Microsoft Agent Framework and Hugging Face MCP Tools
Hi 👋 ! After spending the last few weeks traveling (Argentina, Toronto, Ottawa, Orlando and back!), I finally had time to record a new demo — and this one is pure 🔥 for .NET devs. 🎥 Video: Build AI Agents in C# — Microsoft Agent Framework + Hugging Face MCP👉 Watch it here: 💬 What’s… — read more
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El Bruno 