.NET 10 is here: performance, AI and cloud-ready by default

Welcome back to your newsletter!

.NET 10 has landed as an LTS release, supported until November 2028. It doubles down on raw performance, serious security, and first-class AI tooling – while keeping the stack familiar for existing .NET teams.

Let`s explore.

Faster by design

.NET 10 is the fastest .NET so far, thanks to work in the runtime and JIT:

• Smarter inlining and devirtualisation, better struct handling, and improved loop and stack allocation
• Hardware acceleration for new Intel APX / AVX10.2 and Arm64 SVE, with GC pause reductions on Arm64
• NativeAOT improvements for smaller, faster, ahead-of-time binaries

For teams already on .NET 8 or 9, you should see gains just by recompiling.

C# 14 and F# 10 – less boilerplate, more control

C# 14 focuses on cleaner, more expressive code:

• Field-backed properties via the field keyword
• More powerful extension members, including extension properties
• First-class Span<T> conversions and null-conditional assignment
• Partial constructors/events and better overload resolution

F# 10 tightens the functional story:

• Scoped warning suppression and more precise access modifiers
• Struct-based ValueOption in hot paths
• Tail-call support in computation expressions and parallel compilation

This is mostly “quality of life” for existing teams rather than a new learning cliff.

Secure, modern libraries and Aspire for cloud apps

On the library side, .NET 10:

• Expands post-quantum cryptography support (ML-DSA / ML-KEM, composite modes)
• Improves networking with WebSocketStream, TLS 1.3 on macOS, and broad HTTP/WebSocket optimisations

Aspire 13 ships alongside .NET 10 as the opinionated way to orchestrate front ends, APIs, containers and databases:

• Simple AppHost-centric model for distributed apps
• Built-in telemetry, service discovery and cloud-friendly config
• Better polyglot support if parts of your system run on Python/Node/others

AI, agents and MCP

AI is no longer an afterthought in .NET:

• Microsoft Agent Framework gives you primitives for multi-agent systems (sequential, concurrent, group workflows) with DI and OpenTelemetry baked in
• Microsoft.Extensions.AI and VectorData provide provider-agnostic abstractions for chat, embeddings and vector stores
• First-class Model Context Protocol (MCP) support makes it easier to expose internal tools and services safely to agents

If you are experimenting with agents or RAG, this is now a first-class path rather than a side library.

Web, apps and data

Across the rest of the stack:

• ASP.NET Core / Blazor: passkey support, better OpenAPI, automatic validation in minimal APIs, stronger diagnostics, improved Blazor state persistence and streaming
• .NET MAUI: updated iOS/Android bindings, better XAML tooling, multi-file MediaPicker, HybridWebView improvements
• EF Core 10: vector search in SQL Server/Azure SQL, native JSON type support, hybrid vector + full-text search in Cosmos DB, complex types mapped to JSON columns

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