Months combo box

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.Navigation;
using System.Windows.Shapes;

namespace WpfApp1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            List<string> ListOfMonths = new List<string>()
            {
                "Gennaio",
                "Febbraio",
                "Marzo",
                "Aprile",
                "Maggio",
                "Giugno",
                "Luglio",
                "Agosto",
                "Settembre",
                "Ottobre",
                "Novembre",
                "Dicembre"
            };

            foreach(var month in ListOfMonths)
            {
                cmb1.Items.Add(month);
            }
        }

        private void cmb1_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {

            cmb2.Items.Clear();

            string month = cmb1.SelectedItem.ToString();

            int x = 1;

            switch (month)
            {
                case "Gennaio":
                    while(x <= 31)
                    {
                        cmb2.Items.Add(x);
                        x++;
                    }
                    break;
                // TODO add remaining months cases
            }
        }
    }
}