private void EntitiesComboBox_Loaded(object sender, RoutedEventArgs e)
        {
            try
            {
                var properties = typeof(SQLiteDBContext).GetProperties().Where(p => p.PropertyType.Name.Contains("DbSet")).Select(p => new { p.Name, Value = p.GetValue(dBContext) });
                EntitiesComboBox.DisplayMemberPath = "Name";
                EntitiesComboBox.SelectedValuePath = "Value";
                EntitiesComboBox.ItemsSource = properties;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }