param($inputString)
$words = $inputString.Split('_')
$outputString = ""
foreach ($word in $words) {
    $outputString += $word.Substring(0,1).ToUpper() + $word.Substring(1).ToLower() + ""
}
$outputString = $outputString.TrimEnd()
$outputString -replace ' ', '' # 如果想要没有空格的字符串，取消注释这行代码
$outputString