private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            SqlAction sql = new SqlAction();

            sql.AddPersson(TBFN.Text, TBLN.Text, Convert.ToInt32(TBA.Text), TBC.Text, TBAM.Text, TBL.Text, TBP.Text);
            this.Close();
        }
 private void Button_Click_1(object sender, RoutedEventArgs e)
 {
     if (!System.IO.File.Exists(AppDomain.CurrentDomain.BaseDirectory + "Account.dat"))
     {
         SqlAction sql = new SqlAction();
         sql.AddPersson(TBFN.Text, TBLN.Text, Convert.ToInt32(TBA.Text), TBC.Text, TBAM.Text, TBL.Text, TBP.Text);
         System.IO.File.Create(AppDomain.CurrentDomain.BaseDirectory + "Account.dat");
         this.Close();
     }
     else
     {
         MessageBox.Show("Warning!", "You can't create more then 1 account");
     }
 }