$keepConfigs = @('R_Wikigames_Eng', 'D_Wikigames_Eng')

$projects = Get-Project -All

foreach ($proj in $projects) {
	Write-Host "Project: $($proj.Name)"

	# ConfigurationManager (DTE)
	$configMgr = $proj.ConfigurationManager
	$configNames = $configMgr.ConfigurationRowNames

	foreach ($cfg in $configNames) {
		# remove config if not in keepConfigs
		if ($cfg -notin $keepConfigs) {
			Write-Host "- remove config: $cfg"
			$configMgr.DeleteConfigurationRow($cfg)
		}
	}
}