40 articles on AJ's Tech Notes tagged with .NET.
Call a six-second MCP tool as a task and poll it to completion with the C# Tasks extension: server and client code that ran, the client methods, and what to fix before production.
By Ajith Joseph · · #dotnet #csharp #mcp #aspnet-core
.NET 8 and .NET 9 reach end of support on November 10, 2026. A checklist for moving AI and MCP projects to .NET 10, and why .NET 11 can wait in CI for now.
By Ajith Joseph · · #dotnet #csharp #ai #aspnet-core
Require a human yes before an agent runs a risky tool in Microsoft Agent Framework. Tested numbers for approve and reject, and the local-function naming trap that made it look broken.
Score model output in unit tests with Microsoft.Extensions.AI.Evaluation: the packages, a first relevance evaluation, how to assert safely, and rules for keeping an LLM judge repeatable.
By Ajith Joseph · · #dotnet #csharp #ai #testing
A production pipeline for IChatClient with Microsoft.Extensions.AI 10.x: cache, function invocation, OpenTelemetry and logging, why the order matters, and two tests that prove it.
By Ajith Joseph · · #dotnet #csharp #ai #middleware
The smallest stateless ASP.NET Core MCP server Copilot Studio can use, how to prove it with curl before touching the portal, whether an older client still works, and a failure checklist.
By Ajith Joseph · · #dotnet #copilot-studio #mcp #aspnet-core
What changed between MCP C# SDK 2.0 and 2.3: stateless HTTP by default, Tasks as an extension, nullable ServerInfo and stricter OAuth, with an upgrade checklist tested against a real server.
By Ajith Joseph · · #dotnet #csharp #mcp #aspnet-core
Survey data shows agent adoption outrunning security. How Entra Agent IDs, MCP auth changes, and a deny-by-default tool gate (tested C#) give AI agents least privilege.
By Ajith Joseph · · #dotnet #security #authentication #copilot-studio #ai-agents
The July 2026 MCP spec removes sessions and the initialize handshake. Verified changes, real requests against a C# server, gateway routing, and a migration checklist.
Embed a Copilot Studio agent in a React customer portal securely: a .NET token broker, opaque session handles, safe context passing, and tools that cannot be prompt-injected.
By Ajith Joseph · · #react #dotnet #security #copilot-studio #ai-agents
A real-world Copilot Studio example with working C# code: build an MCP server over an existing order API, connect it as an agent tool, and ship it safely.
By Ajith Joseph · · #dotnet #csharp #copilot-studio #mcp #ai-agents
Learn how to build a production agent harness in .NET, with an orchestrator, specialized sub-agents, dedicated context windows, and durable state.
Discover how Entity Framework Core in 2026 handles massive datasets for AI applications. Learn best practices, new features, and optimization tips....
By Ajith Joseph · · #dotnet #ai #performance #entity-framework
Learn how to deploy .NET 10 Web APIs to Google Cloud Run with cost optimization tips. Step-by-step guide for serverless, scalable, and budget-friendly deployments....
By Ajith Joseph · · #dotnet #docker #cost-optimization #google-cloud
Learn how to dockerize .NET 10 Web APIs and deploy them to Google Cloud Run in 2026 with this step-by-step guide. Optimize, secure, and scale effortlessly....
By Ajith Joseph · · #dotnet #docker #google-cloud
Discover how to build microservices with .NET 10.0! Explore the latest runtime and ASP.NET Core features for scalable, high-performance apps. Start now!...
By Ajith Joseph · · #dotnet #microservices #architecture #aspnet-core
Learn how to patch .NET 10.0 in production to fix April 2026 RCE vulnerabilities. Step-by-step guide, best practices, and post-patching tips included....
By Ajith Joseph · · #dotnet #security
Discover how to build a scalable full-stack app using React, Next.js, .NET, vector search, and AI chat in this step-by-step guide. (159 characters)...
By Ajith Joseph · · #dotnet #nextjs #azure #architecture #vector-databases
Learn how to build an AI chat interface in React with a .NET backend. Step-by-step guide with code examples, best practices, and real-time integration tips....
By Ajith Joseph · · #react #dotnet #ai
Learn how to implement prompt engineering, function calling, and structured outputs in .NET APIs for smarter, scalable, and efficient applications....
By Ajith Joseph · · #dotnet #ai #function-calling #prompt-engineering
Learn how to build powerful multi-agent systems using Microsoft Agent Framework and React dashboards. Step-by-step guide with best practices....
By Ajith Joseph · · #react #dotnet #azure #ai-agents #multi-agent-systems
Learn how to create a RAG application using .NET and React for internal knowledge assistants. Step-by-step guide with best practices and code examples....
Learn how to build AI apps in .NET 10 using Microsoft.Extensions.AI. Step-by-step guide for developers to integrate AI seamlessly....
By Ajith Joseph · · #dotnet #csharp #ai
Learn how to implement Clean Architecture in .NET Core for scalable enterprise apps. Discover best practices, layers, and real-world examples in 160 chars....
By Ajith Joseph · · #dotnet #architecture #clean-architecture
Learn how to implement RAG (Retrieval-Augmented Generation) in .NET applications with this step-by-step guide. Boost accuracy and relevance in AI responses....
By Ajith Joseph · · #dotnet #ai #azure #rag
Unsure whether to use modular monoliths or microservices for your .NET project in 2025? Compare pros, cons, and best practices to make an informed decision....
Learn how to secure .NET Core apps with modern authentication & authorization patterns. Explore best practices, OIDC, JWT, and role-based access control....
By Ajith Joseph · · #dotnet #security #authentication #aspnet-core
Discover advanced ASP.NET Core performance optimization techniques to enhance speed, scalability, and efficiency. Implement expert tips today!...
Discover the top .NET MAUI best practices for 2025 to build high-performance, cross-platform mobile apps efficiently and effectively....
By Ajith Joseph · · #dotnet #maui #mobile
Discover Entity Framework Core 9's latest features, performance improvements, and optimizations to enhance your .NET development workflow....
Discover how Native AOT compilation in .NET 9 enhances performance, reduces startup time, and optimizes apps. Learn best practices and step-by-step implementation....
Discover 5 practical examples of AI and ML integration using ML.NET in Learn how to build, train, and deploy models for real-world applications. Perfect for developers!...
By Ajith Joseph · · #dotnet #ai #machine-learning
Learn how to start with .NET Aspire for cloud-native development. Discover its features, setup steps, and best practices for building scalable apps....
By Ajith Joseph · · #dotnet #aspire #cloud-native
Compare Blazor WebAssembly vs Server in 2025: performance benchmarks, pros/cons, and expert recommendations to choose the right framework for your project....
By Ajith Joseph · · #dotnet #performance #blazor #webassembly
Learn how to build scalable microservices using .NET 9 and Docker. Follow this step-by-step guide for best practices, deployment tips, and optimization techniques....
By Ajith Joseph · · #dotnet #docker #microservices
Learn how the ASP.NET Core request pipeline works, its middleware components, and how to customize it for optimal performance and functionality.
Middleware is a core feature of ASP.NET Core that processes HTTP requests and responses in the request/response pipeline. It enables cross-cutting concerns like logging, authentication, error handling, and more. Learn how middleware works, its types, how to create custom middleware, and best practices for implementing it in your ASP.NET Core applications.
By Ajith Joseph · · #dotnet #csharp #middleware #aspnet-core
Dependency Injection (DI) is a key design pattern in .NET Core that promotes loose coupling, testability, and maintainability. This guide explains the concepts, types of service lifetimes, implementation, and best practices for using DI in .NET Core applications. Learn how to build modular and scalable applications with built-in Dependency Injection.
Complete guide to RESTful API architecture and best practices for .NET developers
By Ajith Joseph · · #dotnet #csharp #api-design
Learn how to build secure and scalable REST APIs using .NET Core with JWT authentication and best practices
By Ajith Joseph · · #dotnet #security #api-design