Clarify customer intent and enhance file-based apps description

[AdmiralSnyder]

Updated customer intent description for clarity and added a reference to directives.

Summary

Describe your changes here.

Fixes #Issue_Number (if available)

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Internal previews

📄 File	🔗 Preview link
docs/csharp/fundamentals/tutorials/file-based-programs.md	Tutorial: Build file-based C# programs

[AdmiralSnyder]

Here's an additional question. in the document, it's stated that dotnet run has to be used to execute file based projects. iirc, in dotnetconf it was demoed that dotnet myfile.cs was sufficient - shouldn't that be what is recommended in this beginner tutorial (since it removes (unnecessary) console input?

[Copilot]

Pull request overview

This PR makes two small improvements to the file-based programs tutorial: corrects a grammar issue in the customer intent metadata comment (adding "to" before "build"), and enhances the description by adding a cross-reference link to the preprocessor directives documentation where shebang directives are mentioned.

Key Changes

• Fixed grammar in customer intent comment: "I want build" → "I want to build"
• Added cross-reference link to preprocessor directives documentation for the shebang directives mention

[BillWagner]

Here's an additional question. in the document, it's stated that dotnet run has to be used to execute file based projects. iirc, in dotnetconf it was demoed that dotnet myfile.cs was sufficient - shouldn't that be what is recommended in this beginner tutorial (since it removes (unnecessary) console input?

Yes, dotnet myfile.cs is now sufficient. (That's the price of working with previews. @AdmiralSnyder Do you want to add that update to this PR?