.NET 5 to 10: Key Features Introduced in Every Release

Every November, .NET Conf brings a new major release of .NET. If you have been building on the platform since the early 2020s, you have watched the ecosystem move from “.NET Core” to a single, unified .NET — and pick up minimal APIs, Native AOT, Blazor full stack, Aspire, and a steady stream of C# language improvements along the way. This post is a guided tour of what landed in each major version from .NET 5 through .NET 10. It is not exhaustive — Microsoft ships hundreds of changes per release — but it should help you remember which version introduced what, and where to dig deeper. Version Released Support type C# version Status (June 2026) .NET 5 Nov 2020 STS (18 months) C# 9 End of support .NET 6 Nov 2021 LTS (3 years) C# 10 End of support .NET 7 Nov 2022 STS (18 months) C# 11 End of support .NET 8 Nov 2023 LTS (3 years) C# 12 Supported .NET 9 Nov 2024 STS (2 years) C# 13 Supported .NET 10 Nov 2025 LTS (3 years) C# 14 Current LTS .NET 11 Nov 2026 Preview C# 15 Preview Until Nov…