Run dotnet tests on CI

[bonigarcia]

Description

This PR allows running the .Net tests on CI. For that, this commit does the following:

• Change workflow setup to run tests
• Fix some tests (e.g. due brittle logic)
• Fix doc according to the changes in the tests (e.g. scripts referred lines)

Motivation and Context

This PR is a continuation of #1081 (Java), #1110 (Python), #1111 (Kotlin), #1113 (JavaScript), and #1117 (Ruby). The final objective is to execute all test examples in CI.

Types of changes

• [X] Change to the site (I have double-checked the Netlify deployment, and my changes look good)
• [X] Code example added (and I also added the example to all translated languages)
• [ ] Improved translation
• [ ] Added new translation (and I also added a notice to each document missing translation)

Checklist

• [X] I have read the contributing document.
• [X] I have used hugo to render the site/docs locally and I am sure it works.

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