System.Management.Automation.ScriptBlock (class)

A System.Management.Automation.ScriptBlock is a pre-compiled PowerShell script block:

PS C:\> $scriptBlock = { write-host 'Hello world' } PS C:\> $scriptBlock.GetType().FullName System.Management.Automation.ScriptBlock PS C:\> 1 .. 3 | forEach-object $scriptBlock Hello world Hello world Hello world

Properties and Methods

`Ast`
`Attributes`
`CheckRestrictedLanguage()`
`Create()`
`DebuggerHidden`
`File`
`GetNewClosure()`
`GetPowerShell()`
`GetSteppablePipeline()`
`Id`
`Invoke()`
`InvokeReturnAsIs()`
`InvokeWithContext()`
`IsConfiguration`
`IsFilter`
`Module`
`StartPosition`
`ToString()`

GetNewClosure

$var = 'initial value for variable var'
$sb = {
   write-host "Script block is invoked"
   write-host "  var = $var"
   if (test-path variable:xyz) {
       write-host "  The variable xyz is defined, it's value is $xyz"
   }
   else {
       write-host "  The variable xyz is not defined"
   }
}

$sb_closure = $sb.GetNewClosure()


$var = 'changed value for variable var'
$xyz = 'Value for xyz'

& $sb
& $sb_closure

If this code is placed into a script and executed, it prints:

Script block is invoked
  var = changed value for variable var
  The variable xyz is defined, it's value is Value for xyz
Script block is invoked
  var = initial value for variable var
  The variable xyz is not defined