C#文件拖到TextBox中獲取文件顯示文件路徑

private void textBox1_DragDrop(object sender, DragEventArgs e)
        {
            textBox1.Text = ((System.Array)e.Data.GetData(DataFormats.FileDrop)).GetValue(0).ToString();
        }

        private void textBox1_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data .GetDataPresent(DataFormats .FileDrop ))
            {
                e.Effect = DragDropEffects.Link;
            }
            else
            {
                e.Effect = DragDropEffects.None;
            }
        }