private void btnNumBranches_Click(object sender, RoutedEventArgs e)
 {
     var numBranches = new NumBranchesPerCity();
     numBranches.ShowDialog();
 }
        private void btnNumBranches_Click(object sender, RoutedEventArgs e)
        {
            var numBranches = new NumBranchesPerCity();

            numBranches.ShowDialog();
        }