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Microsoft Releases .NET 10 LTS and C# 14 as Visual Studio 2026 Arrives

Backed by three years of support, the release centers on AI tooling, performance gains and simplified web and data development.

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Overview

  • .NET 10, C# 14 and associated tooling are now available as a Long Term Support platform through November 2028, launching in conjunction with .NET Conf.
  • C# 14 adds field-backed properties, extension members and null-conditional assignment, plus single-file scripts that run with dotnet run and can be converted into full projects.
  • ASP.NET Core introduces built-in validation for Minimal APIs, default OpenAPI 3.1 with optional YAML output, a Server-Sent Events helper and WebAuthn/passkey authentication.
  • Entity Framework Core 10 delivers complex types with JSON mapping, LeftJoin and RightJoin in LINQ, ExecuteUpdate for JSON columns, named query filters and vector data integrations.
  • .NET 10 expands AI support with the Microsoft Agent Framework, Microsoft.Extensions.AI and MCP, brings runtime/JIT and hardware acceleration boosts, and ships alongside Visual Studio 2026’s Fluent UI refresh, faster solution loading, Copilot Free limits and an expanded Aspire toolkit.