C# 如何让一个按钮每按一下，按钮里面的的text值发生变化，按六次，有六个不同的值

Question

C# 如何让一个按钮每按一下，按钮里面的的text值发生变化，按六次，有六个不同的值

Answer 1

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

namespace Q696139
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        string[] arr = { "a", "b", "c", "d", "e" };

        int i = 0;

        private void button1_Click(object sender, EventArgs e)
        {
            textBox1.Text = arr[i];
            i = ++i % arr.Length;
        }
    }
}