点击windows创建的form1窗体上的butten按钮

Question

        private void button1_Click(object sender, EventArgs e)
        {
            File.Copy("d:\\123.txt", "e:\\123.txt");
            MessageBox.Show("倒腾完毕");
        }

Answer 1

     private void button1_Click(object sender, EventArgs e)
        {
            File.Copy("d:\\123.txt", "e:\\123.txt");
            MessageBox.Show("倒腾完毕");
        }

Answer 2

File.Copy("c:\\123.txt", "d:\\123.txt");