In the previous post “Leveraging Microsoft.Extensions.AI for Tool Calling in C#“, we explored how to create custom tools that enhance the capabilities of Large Language Models (LLMs). We demonstrated how integrating these technologies enables developers to build applications with advanced AI capabilities, facilitating more complex interactions.

In this post, we’ll take a step further and explore how to leverage Model Context Protocol (MCP) servers to utilize external Tools and AI models in C# applications. We’ll continue using Ollama to run local AI models.

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.NET Aspire 9.1 was just released on February 25th, 2025. It comes with great new dashboard features, and there is more! One feature I am particularly interested in is the ability to use Dev Containers.

In this post, I will show you how to use the new .NET Aspire 9.1 with a Dev Container and JetBrains Rider. You could also use Visual Studio Code.

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In the previous post “Learning AI function calling in C# with Llama 3.2 SLM and Ollama running on your machine“, we wrapped our head around the concept of tool calling and implemented a C# source generator enabling our functions to be called by Llama 3.2 SLM using Ollama.

In this post, we will explore how to use Microsoft Extensions AI for tool calling in a simple .NET CLI application. We will leverage the power of Ollama and Llama 3.2 SLM to call functions and interact with the AI model using C#.

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Laurent Kempé

I am an experienced Team Leader & Distinguished Solution Architect with a passion for shipping high-quality products by empowering development team and culture toward an agile mindset. I bring technical vision and strategy, leading engineering teams to move product, processes and architecture forward.


Team Leader, Distinguished Solutions Architect


Illzach, France