Sourcecode SettingsWindow

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Security.Cryptography;

namespace HackerplaceWidget
{
    /// <summary>
    /// Interaktionslogik für SettingsWindow.xaml
    /// </summary>
    public partial class SettingsWindow : Window
    {
        public SettingsWindow()
        {
            InitializeComponent();
        }

        private void save_btn_Click(object sender, RoutedEventArgs e)
        {
            MD5CryptoServiceProvider md5_prov = new MD5CryptoServiceProvider();

            string usr_md5 = System.BitConverter.ToString(md5_prov.ComputeHash(Encoding.Default.GetBytes(username_box.Text.ToLowerInvariant()))).ToLowerInvariant().Replace("-", "");
            HackerplaceWidget.Properties.Settings.Default.username_md5 = usr_md5;
            usr_md5 = null;

            HackerplaceWidget.Properties.Settings.Default.username = username_box.Text;

            string pw_md5 = System.BitConverter.ToString(md5_prov.ComputeHash(Encoding.Default.GetBytes(passwort_box.Password + ""))).ToLowerInvariant().Replace("-", "");
            HackerplaceWidget.Properties.Settings.Default.password_and_pwstring_md5 = pw_md5;
            pw_md5 = null;

            HackerplaceWidget.Properties.Settings.Default.save_pw = savepw_cbox.IsChecked.Value;

            md5_prov.Clear();
            md5_prov = null;

            HackerplaceWidget.Properties.Settings.Default.Save();
            try
            {
                int refreshinterval = Convert.ToInt32(refreshtime_box.Text);
                HackerplaceWidget.Properties.Settings.Default.refreshinterval = refreshinterval;
                HackerplaceWidget.Properties.Settings.Default.Save();
                MessageBox.Show("Erfolgreich gespeichert!");
            }
            catch
            {
                MessageBox.Show("Ungültiger Aktualisierungsintervall!");
                refreshtime_box.Text = "10000";
                return;
            }
        }

        private void Window_Loaded_1(object sender, RoutedEventArgs e)
        {
            username_box.Text = HackerplaceWidget.Properties.Settings.Default.username;
            savepw_cbox.IsChecked = HackerplaceWidget.Properties.Settings.Default.save_pw;
            refreshtime_box.Text = HackerplaceWidget.Properties.Settings.Default.refreshinterval.ToString();

            notify_below_percent_stock_cbox.IsChecked = HackerplaceWidget.Properties.Settings.Default.notify_below_percent_stock;
            notify_below_percent_stock_box.Text = HackerplaceWidget.Properties.Settings.Default.notify_below_percent_stock_value.ToString();

            notify_over_percent_stock_cbox.IsChecked = HackerplaceWidget.Properties.Settings.Default.notify_over_percent_stock;
            notify_over_percent_stock_box.Text = HackerplaceWidget.Properties.Settings.Default.notify_over_percent_stock_value.ToString();

            notify_below_stock_cbox.IsChecked = HackerplaceWidget.Properties.Settings.Default.notify_below_stock;
            notify_below_stock_box.Text = HackerplaceWidget.Properties.Settings.Default.notify_below_stock_value.ToString();

            notify_over_stock_cbox.IsChecked = HackerplaceWidget.Properties.Settings.Default.notify_over_stock;
            notify_over_stock_box.Text = HackerplaceWidget.Properties.Settings.Default.notify_over_stock_value.ToString();

            notify_new_message_cbox.IsChecked = HackerplaceWidget.Properties.Settings.Default.notify_new_message;

            show_top_cbox.IsChecked = Properties.Settings.Default.show_top;
        }

        private void save_btn2_Click(object sender, RoutedEventArgs e)
        {
            try{
                HackerplaceWidget.Properties.Settings.Default.notify_below_percent_stock = notify_below_percent_stock_cbox.IsChecked.Value;
                HackerplaceWidget.Properties.Settings.Default.notify_below_percent_stock_value = Convert.ToInt32(notify_below_percent_stock_box.Text);

                HackerplaceWidget.Properties.Settings.Default.notify_over_percent_stock = notify_over_percent_stock_cbox.IsChecked.Value;
                HackerplaceWidget.Properties.Settings.Default.notify_over_percent_stock_value = Convert.ToInt32(notify_over_percent_stock_box.Text);

                HackerplaceWidget.Properties.Settings.Default.notify_below_stock = notify_below_stock_cbox.IsChecked.Value;
                HackerplaceWidget.Properties.Settings.Default.notify_below_stock_value = Convert.ToInt32(notify_below_stock_box.Text);

                HackerplaceWidget.Properties.Settings.Default.notify_over_stock = notify_over_stock_cbox.IsChecked.Value;
                HackerplaceWidget.Properties.Settings.Default.notify_over_stock_value = Convert.ToInt32(notify_over_stock_box.Text);

                HackerplaceWidget.Properties.Settings.Default.notify_new_message = notify_new_message_cbox.IsChecked.Value;
                HackerplaceWidget.Properties.Settings.Default.Save();
                MessageBox.Show("Erfolgreich gespeichert!");
            }
            catch{
                MessageBox.Show("Ungültiger Wert");
                return;
            }
        }

        private void save_btn3_Click(object sender, RoutedEventArgs e)
        {
            Properties.Settings.Default.show_top = show_top_cbox.IsChecked.Value;
            Properties.Settings.Default.Save();
            MessageBox.Show("Erfolgreich gespeichert!");
        }
    }
}