title: Change label backcolor when click
body: <p>Hello guys i have a easy problem here, if i click the <code>label1</code> it will change back Color to Red but my default Back Color is transparent.</p>
  
  <pre><code>   private void label_Click(object sender, EventArgs e)
     {
  
         label1.BackColor = Color.Red;
     }
  
     private void label2_Click(object sender, EventArgs e)
     {
         label2.BackColor = Color.Red;
     }
  </code></pre>
  
  <p>what if i click the label again i want it to change color to transparent, how do i code that? Thank you in advance! :D</p>
  
  <pre><code>label.BackColor = Color.Transparent;
  </code></pre>