我如何用一个按钮控制2个图片框上传照片

Question

private void button6_Click(object sender, EventArgs e)
    {
        OpenFileDialog fd = new OpenFileDialog();
        fd.Filter = "Image Files(*.jpg; *.jpeg; *.gif; *.bmp)|*.jpg; *.jpeg; *.gif; *.bmp";
        fd.ShowDialog();
        pictureBox12.ImageLocation = fd.FileName;
        textBox35.Text = fd.FileName;

        if (pictureBox12.ImageLocation == fd.FileName)
        {
                OpenFileDialog fd2 = new OpenFileDialog();
                fd2.ShowDialog();
                pictureBox11.ImageLocation = fd2.FileName;
        }
    }

我有2个图片框和1个上传按钮我想要第一次点击按钮并打开showdialog并选择照片和closinghowdialog再次点击按钮这次选择第二个图片框但问题是第一次点击按钮并一步一步打开showdialog