title: Get PictureBox Name
body: <p>I have 2 PictureBox , name: pictureBox1, pictureBox2 
  how i can get the name of pictureBox that i clicked on it?</p>
  
  <pre><code>    private void pictureBox1_Click(object sender, EventArgs e)
      {
          MessageBox.Show("clicked on: " + ??????);
      }
      private void pictureBox2_Click(object sender, EventArgs e)
      {
          MessageBox.Show("clicked on: " + ???????);
      }
  </code></pre>