Powershell Params example

powershellParams.ps1

Param([
	parameter(
		Mandatory=$true,
		Position=0,
		ValueFromPipelineByPropertyName=$true,
		ValueFromPipeline=$true,
		HelpMessage="Enter one or more User names separated by commas.")
	]
	[ValidateNotNullOrEmpty()]
	[alias("UN","User")]
	[String[]]
	$UserName,
	
	[parameter(
		Mandatory=$true,
		Position=1,
		ValueFromPipelineByPropertyName=$true,
		ValueFromPipeline=$true,
		HelpMessage="Enter one or more Computer names separated by commas.")
	]
	[ValidateNotNullOrEmpty()]
	[alias("CN","Computer")]
	[String[]]
	$ComputerName
	
	[switch]$DebugValue
)