PowerShell v5 'using namespace' syntax test

PowerShellv5_UsingNamespace.ps1

#Require -Version 5.0

# using statement must appear before any other statements in a script.
# other using types(Assembly/Command/Module/Type) is not supported yet?
#    [Enum]::GetNames('System.Management.Automation.Language.UsingStatementKind')
using namespace System.Diagnostics
using namespace System.Linq

function Main
{
    Set-StrictMode -Version Latest
    $ErrorActionPreference = "Stop"

    #Using System.Diagnostics.Stopwatch
    $sw = [Stopwatch]::StartNew()
    sleep -Milliseconds 100
    Write-Host ('Elapsed: {0} [ms]' -f $sw.ElapsedMilliseconds)

    #Using System.Linq methods
    [int[]] $array = 1..10
    [Enumerable]::Where($array, [Func[[int], [bool]]]{ param ($p) $p % 2 -eq 0})
}

Main