snippet-project-files

# Snippet project files When adding or fixing project files under `snippets/`: 1. Keep exactly one project file in each directory. 2. Use SDK-style projects and the default compile includes. Don't add explicit `<Compile Include="...">` items. 3. Set `OutputType` to `Exe` when the directory contains an entry point or top-level statements. Otherwise, use `Library`. 4. If multiple source files define `Main`, rename each method to `Run`. 5. Give duplicate types in the same directory unique names. 6. Add one `Program.cs` file that calls every `Run` method, passing `args` to methods that accept command-line arguments. 7. Build the consolidated project and fix all compile errors.