The doc for CA1506 (and presumably related warnings) is succinct to the point of being hard to follow

**Issue description**

A customer reported on the internal StackOverflow page that the doc page for CA1506 was inaccurate and useless. Having looked it over, I think its suggestions on how to suppress warnings seem accurate but are very succinct to the point where it is difficult for even an experienced software engineer to follow unless they work in developer tools. Furthermore, having links to other doc pages makes it harder to know what is important.

One additional way to suppress these warnings is adding `CA1506` to your MSBuild project or specifying it on the command line or in a Directory.Build.props, etc. That option was not mentioned in the doc page.

[This](https://stackoverflow.microsoft.com/questions/334729) is the StackOverflow post I referred to.

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#### Document Details

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* ID: d6bc7ccb-aab7-7e71-f5c5-82cd8fbef17f
* Version Independent ID: b5a70070-37a7-68ee-3ef4-969c961f4486
* Content: [CA1506: Avoid excessive class coupling (code analysis) - .NET](https://learn.microsoft.com/en-us/dotnet/fundamentals/code-analysis/quality-rules/ca1506)
* Content Source: [docs/fundamentals/code-analysis/quality-rules/ca1506.md](https://github.com/dotnet/docs/blob/main/docs/fundamentals/code-analysis/quality-rules/ca1506.md)
* Product: **dotnet-fundamentals**
* GitHub Login: @gewarren
* Microsoft Alias: **gewarren**

Open docs/fundamentals/code-analysis/quality-rules/ca1506.md and read the current guidance and linked suppression pages. Clarify the existing suppression instructions for newcomers, including the NoWarn option in an MSBuild project, command line, or Directory.Build.props. Done means the CA1506 page is accurate, easier to follow, and covers the reported suppression method.

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