.NET 11 Preview 1 is Here: What's New for Enterprise Developers?

Microsoft has just announced the first preview of .NET 11, continuing their annual cadence of delivering major performance improvements and developer productivity features. Released on February 10, 2026, .NET 11 Preview 1 offers a first look at what’s coming next for the platform.

At ASP.NET Zero, we are always excited to see how the ecosystem evolves. Keeping our solution up-to-date with the latest .NET version is a top priority, ensuring our users benefit from the bleeding-edge performance and security enhancements.

Here is a breakdown of the key features in .NET 11 Preview 1 that are most relevant to ASP.NET Core and enterprise application development.

🌐 ASP.NET Core & Blazor Enhancements

For web developers, this release brings several practical updates to Blazor and core infrastructure that streamline UI development:

• New Blazor Components: The EnvironmentBoundary component helps manage UI rendering based on the current environment (e.g., Development vs. Production). There are also new Label and DisplayName components to streamline form generation, reducing boilerplate code.
• QuickGrid Improvements: The QuickGrid component now supports an OnRowClick event, making it easier to build interactive data tables without custom workarounds—a common requirement for admin dashboards.
• Blazor WebAssembly IHostedService Support: You can now run background tasks in Blazor WebAssembly apps using IHostedService, bringing the client-side experience closer to the robustness of server-side applications.
• OpenAPI for Binary Files: The OpenAPI schema generation now supports binary file responses, which is a great addition for APIs serving reports or file downloads.

🎁 Entity Framework Core Updates

Data access sees some powerful new capabilities, particularly for complex data models often found in multi-tenant applications:

• Complex Types & JSON with Inheritance: EF Core now supports Complex Types and JSON columns on entity types that use TPT (Table-per-Type) or TPC (Table-per-Concrete-type) inheritance. This is a significant flexibility boost for domain-driven designs.
• One-Step Migrations: You can now create and apply migrations in a single step, streamlining the local development workflow.
• Azure Cosmos DB Enhancements: For those using NoSQL, there are major improvements including support for transactional batches, bulk execution, and better session token management.

⚡ C# and Runtime Performance

As always, performance is a major theme. .NET 11 Preview 1 introduces:

• C# Collection Expressions: C# continues to evolve with support for arguments in collection expressions (e.g., specifying capacity), making code both concise and performant.
• Async CoreCLR on WebAssembly: Threading support on the web gets a boost with Async CoreCLR on WebAssembly, promising better performance for multi-threaded browser apps.
• JIT & Compression: There are general JIT performance improvements and new Zstandard compression support in the core libraries.

🤖 The Rising Tide of AI-Assisted Development

Beyond the standard web and cloud features, we are closely watching how .NET adapts to the era of Artificial Intelligence. With AI-assisted development becoming the new norm, we are curious to see which specific features the .NET team will prioritize in .NET 11 to support this shift.

Preview 1 already hints at this direction with the inclusion of the BFloat16 floating-point type in the libraries, a format crucial for optimizing machine learning workloads and reducing memory bandwidth usage in AI models.

However, we are eager to see if future previews will introduce higher-level abstractions. Will we see deeper integration with tools like Semantic Kernel directly in the SDK? Will there be new APIs specifically designed to facilitate local LLM inference or vector database interactions? As AI becomes integral to modern software architecture, we anticipate .NET 11 will take significant strides toward becoming a first-class platform for building intelligent applications.

What This Means for ASP.NET Zero Users

We know that performance and long-term stability are critical for the business applications built on ASP.NET Zero. While .NET 11 is still in preview, we are actively monitoring these changes.

Our team is dedicated to migrating ASP.NET Zero to .NET 11 once it reaches a stable release later this year. This ensures that when you build with ASP.NET Zero, you aren't just getting a robust architecture today—you're future-proofing your application for tomorrow.

To read the full release notes and try out the preview yourself, check out the official announcement: Microsoft .NET 11 Preview 1 Announcement.

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