wpf 自定义mask datepicker

注意如果设置了系统dateformat格式。在变化系统culture的时候需要设置dateformat

 CultureInfo info = new CultureInfo(this.LanguageItems[value].Name);
            info.DateTimeFormat.ShortDatePattern= "dd/MM/yyyy";          
  info.DateTimeFormat.LongDatePattern = "dd/MM/yyyy";                 Thread.CurrentThread.CurrentCulture = info;
            Thread.CurrentThread.CurrentUICulture = info;

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