控制输入法

private static bool SetInputLanguage(string layoutName)
  {
   InputLanguageCollection collection = InputLanguage.InstalledInputLanguages;
   foreach(InputLanguage lan in collection)
   {
    if (lan.LayoutName == layoutName)
    {
     InputLanguage.CurrentInputLanguage = lan;
     return true;
    }
   }
   return false;
  
  }