Runs file-based C# apps with the .NET CLI without creating a project.
npx skills add https://github.com/D1ssolve/craft-agents --skill csharp-scripts-d1ssolve
Please help me install this Agent Skill. Skill: csharp-scripts Source: https://github.com/D1ssolve/craft-agents/tree/main/skills/csharp-scripts Command: npx skills add https://github.com/D1ssolve/craft-agents --skill csharp-scripts-d1ssolve
dotnet hello.cs, with cached builds for fast reruns. - Inline directives: Add NuGet packages (#:package), MSBuild properties (#:property), project references (#:project), SDK selection (#:sdk), and multi-file composition (#:include/#:exclude/#:ref) directly in the source file. - Version-aware fallbacks: Detects the installed SDK and falls back to a temporary console project on .NET 9 and earlier. - Use Case: You want to test how System.Text.Json source generation behaves under native AOT. Write one .cs file with a JsonSerializerContext, run it with dotnet file.cs, and delete it when done—no project scaffolding required. ## Quick Start Ask the AI to write and run a quick file-based C# app that tests a specific API or language feature without creating a project.High-intent search queries and answers about installing and using this skill.
With .NET 10 or later, write a .cs file using top-level statements and run it with `dotnet hello.cs`. The CLI builds and runs the file automatically, caching the build so subsequent runs are fast.
Add a `#:package` directive at the top of the file, before any using directives, with an explicit version such as `#:package [email protected]`. Use `@*` for the latest version or `@*-*` to include pre-release versions.
No, file-based apps require .NET SDK 10 or later, and multi-file directives like #:include require SDK 10.0.300 or later. On older SDKs, create a temporary console project with `dotnet new console` and run it with `dotnet run` instead.
File-based apps enable native AOT by default, so reflection-based serialization like `JsonSerializer.Serialize<T>(value)` fails at runtime. Use source-generated serialization with a `JsonSerializerContext` partial class annotated with `[JsonSerializable]`.
Use `#:include` for helper files that should compile into the same assembly as the entry point. Use `#:ref` when the referenced file should compile as a separate project-like assembly, and set `#:property OutputType=Library` in that file if it has no top-level statements.
Convert when the app needs build customization, tests, publish configuration, or integration into an existing solution. Run `dotnet project convert hello.cs` to generate a full project from the file-based app.
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