请问老师，有如下代码，按了button1却没反应是什么明原因？暗跟亮不会发生变化



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

namespace 作业_06057236_岑沛斯
{
    public partial class Form3 : Form
    {
        public Form3()
        {
            InitializeComponent();
        }

        

        private void button1_Click(object sender, EventArgs e)
        {
            
            if (button1.Text=="暗")
                button1.Text="亮";
               
                button2.Text="亮";
                button5.Text="亮";

            }
            else if(button1.Text=="亮")
            {
             button1.Text="暗";
             button2.Text="暗";
             button5.Text="暗";
            }
        }
            private void Form3_Load(object sender, EventArgs e)
        {
           
        }
        private void button2_Click(object sender, EventArgs e)
        {
            if (button2.Text=="暗")
            {
                button2.Text="亮";
                button1.Text="亮";
                button3.Text="亮";
                button7.Text="亮";
            }
            else if(button2.Text=="亮")
            {
                button2.Text="暗";
                button1.Text="暗";
                button3.Text="暗";
                button7.Text="暗";
            }
        }
       }
}