Dyalog APL 18.2(dyalog.com)

          ⎕using←'System.Diagnostics,System.dll'
          st←⎕new Stopwatch
          st.Start
    <pause>
          st.Stop
          st.Elapsed
    00:00:03.5493601

          ⎕using,←⊂'System.Text'
          Encoding.Unicode.GetBytes (⊂'hello')
    104 0 101 0 108 0 108 0 111 0

          ⎕cmd 'echo hello'
    hello

    PS C:\Program Files\j64-807> .\jreg.cmd

    $J = new-object -ComObject JExeServer

    PS C:\> $J.Set('numbers', [int[]](1,2,3))
    0
    PS C:\> $J.Do('answer =: numbers * 2')
    0

    PS C:\> $Result = $null
    PS C:\> $J.get('answer', [ref]$Result)
    0
    PS C:\> $Result
    2
    4
    6

    PS C:\> $J.Do("oops")
    21

    PS C:\> $Text = $null
    PS C:\> $J.ErrorText(21, [ref]$Text)
    0
    PS C:\> [system.text.encoding]::ASCII.GetString($Text)
    value error