"C# 14, included in the .NET 10 SDK, introduces file-based apps, meaning applications contained in a single file with a .cs extension. These look a lot like scripts, and support #! directives on Unix-like platforms, enabling invocation via the ./ prefix when marked as executable. This could be useful for utilities, but the thinking behind this is more about attracting newcomers to the language by simplifying the first steps. Single file applications can be converted to full projects using the new command, dotnet project convert."
"Visual Studio 2026 has a revamped user interface based on Microsoft's Fluent UI design language, deeper integration with Copilot, and improved performance that might speed loading of large multi-project solutions by up to 50 percent, according to principal product manager Mads Kristensen. Microsoft's Windows-only IDE is regularly updated, though, and there is more difference between the earliest and latest VS 2022 than there is between the latest VS 2022 and the new VS 2026."
Microsoft released .NET 10 as a long-term support (LTS) release alongside C# 14, Visual Studio 2026, Aspire 13, and related products. .NET 10 is an LTS release that arrives every two years. C# 14 introduces file-based apps contained in a single .cs file, supports #! directives on Unix-like platforms, and allows conversion to full projects via dotnet project convert. Visual Studio 2026 uses Fluent UI, deeper Copilot integration, and claims up to 50% faster loading for large multi-project solutions. Copilot Free offers up to 2,000 code completions and 50 premium requests monthly, but developers will soon encounter its limits.
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