.NET c#取一个数的个位十位百位千位万位

要求输入的数不多于五位
窗口:

代码:

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 _05取一个数的个位十位百位千位万位
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int i = int.Parse(textBox1.Text);
            int wan = i / 10000;
            textBox2.Text = wan.ToString();
            int qian = (i % 10000) / 1000;
            textBox3.Text = qian.ToString();
            int bai = (i % 1000) / 100;
            textBox4.Text = bai.ToString();
            int shi = (i % 100) /10;
            textBox5.Text = shi.ToString();
            int ge = (i % 10);
            textBox6.Text = ge.ToString();
        }
    }
}

输入一个数点击button1按钮: