Did you know you can get more information about a particular rule/warning within Visual Studio; including its description, information on how to fix it, whether or not it is considered a breaking change, when or when not to suppress it and code samples?
To do this for a particular warning in the Error List:
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To do this for a particular rule:
This information is updated regularly, so you can make sure the Help viewer always displays the most update-to-date information by changing it so that it tries the online MSDN Library version before the local: