title: How to append two field values in combobox display member in C#
body: <p>In my table, I have a field of <code>firstname</code> and <code>lastname</code>, now what I want is to set <code>firstname</code> and <code>lastname</code> as <code>displaymember</code> in a combobox, but I don't know how to do it.</p>
  
  <p>Something like this</p>
  
  <pre><code>cmbEmployees.DataSource = GetEmployees();
  //something like below line which doesn't work
  cmbEmployees.DisplayMember = "lastname, first_name";     
  cmbEmployees.ValueMember = "id";
  </code></pre>
  
  <p>How can I achieve this? So that both <code>lastname</code> and <code>firstname</code> will be displayed in the <code>combobox</code></p>