See .NET 10 and C# 14 updates from the perspective of an API developer via an example: an order management API with validation, OpenAPI docs and EF Core.

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.NET 10 introduces built-in validation for Minimal APIs, eliminating the need for custom validation code. The release includes OpenAPI 3.1 support with improved JSON Schema handling, named query filters in Entity Framework Core 10 for selective filter disabling, and C# 14 features like field-backed properties, null-conditional assignment operators, and extension members. Additional improvements include native Server-Sent Events support for streaming updates. These enhancements focus on reducing boilerplate code and improving developer productivity for API development.

What’s New with APIs in .NET 10: Real Improvements

OpenAPI 3.1: Modernizing API Documentation

Server-Sent Events: Simplifying Real-Time Updates