invoke command - Powershell passing arguments in ScriptBlock -

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i'm trying last write time on file remote server.

this doesn not work:

$server = "myservername"  $lastwrite = invoke-command -computername $server -scriptblock {get-childitem "\\$args[0]\hot.war" } -argumentlist $server | select -property lastwritetime

this work:

 $lastwrite = invoke-command -computername $server -scriptblock {get-childitem "\\myservername\hot.war" } -argumentlist $server | select -property lastwritetime

can make first set work?

another way, if using powershell 3. can this:

$lastwrite = invoke-command -computername $server -scriptblock {                get-childitem "\\$using:server\hot.war"              } | select -property lastwritetime

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