当鼠标光标悬停在按钮上时,背景图像会移动

对不起我的英语。这是我第一次用这种语言写问题。如果你能纠正我的语法错误,我会很高兴的。

我创造了一个 changing_button 并设置其BackgroundImage属性。我希望当光标在这个按钮上时,这个图像会改变。我为此拍了两张照片。

蓝色的图片。巴布亚新几内亚: enter image description here

红色图片。巴布亚新几内亚: enter image description here

正常地 更改按钮 应该显示红色的图像。但如果光标在这个按钮上,它应该会显示蓝色的图片。问题是,当我试图覆盖BackgroundImage属性时,blue_图像会移动: enter image description here

我该怎么解决这个问题?

using System;
using System.Drawing;
using System.Windows.Forms;

namespace winforms_test_1
{
    public partial class Form1 : Form
    {
        Button changing_button;

        Image blue_image = Image.FromFile("D://images//blue_image.png");
        Image red_image = Image.FromFile("D://images//red_image.png");
        public Form1()
        {
            InitializeComponent();
            TableLayoutPanel main_panel = new TableLayoutPanel
            {
                BackColor = Color.White,
                Dock = DockStyle.Fill
            };

            changing_button = new Button
            {
                BackgroundImage = red_image,
                BackgroundImageLayout = ImageLayout.Center,
                FlatStyle = FlatStyle.Flat,
                Margin = new Padding(0, 0, 0, 0),
                Size = new Size(50, 50),
            };
            changing_button.FlatAppearance.BorderSize = 0;
            changing_button.MouseEnter += new System.EventHandler(this.test_button_MouseEnter);
            changing_button.MouseLeave += new System.EventHandler(this.test_button_MouseLeave);

            main_panel.Controls.Add(changing_button, 0, 0);
            Controls.Add(main_panel);
        }

        void test_button_MouseEnter(object sender, EventArgs e)
        {
            changing_button.Image = blue_image;

        }

        void test_button_MouseLeave(object sender, EventArgs e)
        {
            changing_button.Image = red_image;

        }
    }
}