.NET 11 Preview 5: Brings File-Based App Improvements, New C# Features, and a Blazor Validation Wave

▤ Summary

Microsoft released .NET 11 Preview 5 with updates across the runtime, SDK, libraries, ASP.NET Core, .NET MAUI, C#, and Entity Framework Core. The SDK now supports new file-based app workflows, added command-line awareness for file-based paths, and bundled the MCP server template. C# adds preview language features including closed classes, union declarations, and unsafe evolution changes. ASP.NET Core and Blazor gain instant client-side validation, async validation support, and new static rendering capabilities, while .NET MAUI gets reliability fixes and new control updates. Entity Framework Core adds file-based app support, a new analyzer warning, and SQL Server 2022 compatibility as the default.

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