System.Management.Automation.ActionPreference (enum)

System.Management.Automation.ActionPreference enumerates the possible values for PowerShell preference variables related to the Powershell cmdlet verb write:

Values

This enum has the following values

Name	Value	Displays (error?) message	Continues execution	Comments
SilentlyContinue	0	✗	✓	Messages are suppressed, and execution continues. Default for `$informationPreference` and `$verbosePreference`
Stop	1	✓	✓	Stops execution
Continue	2	✗	✓	Display (error...) and continue. Default for `$errorActionPreference` and `$warningPreference`.
Inquire	3	✓		User is prompted for response on how to continue
Ignore	4	✗	✓	Intended for per-command use. The «event» (error etc.) is ignored and not recorded in the respective stream.
Suspend	5			Not valid for `$errorActionPreference`
Break(?)	?	?	?	New in newer version of .NET?

What exactly is the difference between SilentlyContinue and Ignore?

In PowerShell, it's possible to retrieve these values with

[System.Enum]::GetValues('System.Management.Automation.ActionPreference').foreach({
   write-host $_.ToString() $_.value__
})