Microsoft has rolled out the first preview of .NET 10, a major new version of the company’s flagship software development platform. Likely to arrive as a production release in November, .NET 10 introduces C# 14 and adds major enhancements to the .NET runtime, SDK, libraries, ASP.NET Core, Blazor, and .NET MAUI, the company said.
Unveiled February 25, .NET 10 Preview 1 can be downloaded from dotnet.microsoft.com.
Enhancements arriving with C# 14 include first-class support for System.Span and System.ReadOnlySpan in the language. This involves new implicit conversions that allow more natural programming with these types, Microsoft said. This support boosts performance with no risk to safety. Also in C# 14, the argument to nameof can be an unbound generic type. C# 14 also lets developers add parameter modifiers such as scoped, ref, in, or out , or ref readonly to lambda expression parameters without specifying the parameter type.