Multi Search and Replace with Powershell

ReplaceMe.ps1

$Dictionary = @{
    "key1" = "value1";
    "key2" = "value2";
}

$sourceFilename = "template.txt"
$destinationFilename = "output.txt"
$delimStart = "<"
$delimEnd = ">"
$templateContent = Get-Content $sourceFilename
$Dictionary.Keys | ForEach-Object {
    $templateContent = $templateContent -replace "$delimStart$_$delimEnd", ($Dictionary[$_])
}
$templateContent | Set-Content $destinationFilename