這個是?...不是有;了嗎?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Ticket
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnOK_Click(object sender, EventArgs e)
        {
            int h Convert.ToInt32(txtHight.Text);
            string ticket;
            ticket = h > 150 ? "全票" : (h > 115 ? "孩童票" : "免票");
            label2.Text = "票種 : " + ticket;
        }
    }
}