Fix Dependency Injection Snippet (dotnet#35342)

Fixes the output to console to contain the correct type of service fetched from host, i.e. ServiceLifetimeReporter not ServiceLifetimeLogger.

Before mass purge of unused snippets October 2022

Clarify "black box" remark (dotnet#19372)

VS2017 RTM initial update (dotnet#1663)

* changed prereq topic

* screenshots and links

* readding versio info

* renames

* fixed broken link

* feeback + improvements

Fix up HTML escaping in Reference Cells table (dotnet#1021)