C#按钮应用

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 WindowsFormsApplication4
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            button1.Text = "第一个按钮";
            button2.BackgroundImage = Image.FromFile(@"D:\无标题.png");
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show("单击了我", "提示",MessageBoxButtons.YesNo);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Form Form2 = new Form();  
            Form2.BackgroundImage = Image.FromFile(@"D:\无标题.png");
            Form2.Show();
        }
    }
}