Add missing functions in Q# example

[pferreirafabricio]

Some functions were missing on Develop with Q# and .NET tutorial, making it unfeasible to execute the examples. Related to the #474 and the PR #503.

[prmerger-automator]

@pferreirafabricio : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[tedhudek]

Docs Build status updates of commit 8431762:

✅ Validation status: passed

File	Status	Preview URL	Details
articles/install-csharp-qdk.md	✅Succeeded

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the docs.microsoft.com contributor guides
• Post your question in the Docs support channel

[Court72]

@Bradben

Can you review the proposed changes? IMPORTANT: When the changes are ready for publication, add a #sign-off comment to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

[Bradben]

This issue has been addressed in PR 936 of the private repo.