PowerShellメモ

# powershell -v 2 -c .\replace.ps1

$dic = @{
  '${TEST1}' = 'テスト1';
  '${test2}' = 'テスト2';
}

$content = @(
    '--テスト--',
    '--${TEST1}:${TEST2}:${test1}:${test2}--')

$vars = @()
[RegEx]::Matches($content, '\${[^}]+}') | ForEach-Object {
  if ($vars -contains $_.Value) { return }
  $vars += $_.Value
}

$content | ForEach-Object {
  Write-Host $_
}
$vars | ForEach-Object {
  $content = $content -replace [Regex]::Escape($_), $dic.$_
}
$content | ForEach-Object {
  Write-Host $_
}

実行結果

--テスト--
--${TEST1}:${TEST2}:${test1}:${test2}--
--テスト--
--テスト1:テスト2:テスト1:テスト2--

function Rewrite($key, $value, $filename, $outfilename) {
    Get-Content $filename |
    ForEach-Object { $_ -replace "^\[item $($key)\(""[^""]*""\)\]$", "[item $($key)(""$($value)"")]" } |
    Set-Content $outfilename
}

Rewrite "Key" "TEST" file1.cs file2.cs