private void DateTimePicker_Loaded(object sender, RoutedEventArgs e)
{
DatePicker datePicker = this.GetTemplateChild("PART_DatePicker") as DatePicker;
if (datePicker != null)
{
TextBox textBox = datePicker.GetVisualChild <TextBox>();
if (textBox != null)
{
textBox.Visibility = Visibility.Collapsed;
}
}
}
