title: Multiple Buttons call same function.Can figure out which button called the function?
body: <p>I have 5 buttons that are going to call this popup function to send an email. How can I figure out which clicked button called the function?</p>
  
  <pre><code>   public void popup(object sender, EventArgs e)
      {
  
          if (MessageBox.Show("You may not Bind, Change, Or Alter Insurance Coverage through e-mail. Confirmation of this e-mail by us initiates any changes to your Insurance. If you need any immediate service please contact our office at 1-800-875-5720.", "IMPORTANT!", MessageBoxButtons.OKCancel) == DialogResult.OK)
          {
  
              {
                  string email = "mailto:davidadfa.t@ifdafdadf.com";
                  Process.Start(email);
              }
          }
      }
  </code></pre>