when put at the top of a script ensures it is [re]ran as admin

selfElevate.ps1

#at top of script
if (!
	#current role
	(New-Object Security.Principal.WindowsPrincipal(
		[Security.Principal.WindowsIdentity]::GetCurrent()
	#is admin?
	)).IsInRole(
		[Security.Principal.WindowsBuiltInRole]::Administrator
	)
) {
	#elevate script and exit current non-elevated runtime
	Start-Process `
		-FilePath 'powershell' `
		-ArgumentList (
			#flatten to single array
			'-File', $MyInvocation.MyCommand.Source, $args `
			| %{ $_ }
		) `
		-Verb RunAs
	exit
}

#example program, this will be ran as admin
$args
Pause
exit