private void toolStripComboBox1_SelectedIndexChanged(object sender, EventArgs e)
 {
     Config c = new Config();
     foreach (Config cf in configurations.confs)
         if (cf.name == toolStripComboBox1.Text) c = cf;
     textBox1.Text = c.ip;
     textBox2.Text = c.mask;
     textBox4.Text = c.gw;
     textBox3.Lines = c.dns;
     if (c.dhcp == true) dhcp.Checked = true;
 }
        private void Save_Click(object sender, EventArgs e)
        {
            Config cf = new Config();
            cf.name = toolStripComboBox1.Text;
            cf.ip = textBox1.Text;
            cf.mask = textBox2.Text;
            cf.gw = textBox4.Text;
            cf.dns = textBox3.Lines;
            configurations.confs.Add(cf);
            Serialize();

            Deserialize();
            Initialize();
        }