private void reset()
{
textbox_name.BorderBrush = Brushes.LightGray;
textbox_name.BorderThickness = new Thickness(2);
textbox_email.BorderBrush = Brushes.LightGray;
textbox_email.BorderThickness = new Thickness(2);
user_pin.BorderBrush = Brushes.LightGray;
user_pin.BorderThickness = new Thickness(2);
checkbox_agreement1.BorderBrush = Brushes.Gray;
checkbox_agreement1.BorderThickness = new Thickness(2);
checkbox_agreement2.BorderBrush = Brushes.Gray;
checkbox_agreement2.BorderThickness = new Thickness(2);
avatar_border.BorderBrush = Brushes.LightGray;
avatar_border.BorderThickness = new Thickness(0);
desc.Visibility = System.Windows.Visibility.Hidden;
desc.Text = "Welcome";
required1.Foreground = Brushes.Red;
required2.Foreground = Brushes.Red;
required1.FontWeight = FontWeights.Normal;
required2.FontWeight = FontWeights.Normal;
if (avatar_frame.Visibility == System.Windows.Visibility.Visible)
avatar_frame.Visibility = System.Windows.Visibility.Hidden;
}