title: Key in C# combobox but show different value
body: <p>I want to do a query on a database that will bring up a customerID (identity) and first and last name.</p>
  
  <p>In the combobox I want to show first and last name but when selected - the value is the customerID. The customerID would run be the subject of another query to auto-populate a windows form.</p>
  
  <p>This is what I have so far - I know the <code>combobox.Items.Add</code> part is wrong - that's where I'm having my issue.</p>
  
  <pre><code>conn = new SqlConnection();
  conn.ConnectionString = "my connection string";
  
  SqlDataAdapter da = new SqlDataAdapter("Select * from Customer", conn);
  DataTable dt = new DataTable();
  
  da.Fill(dt);
  
  for (int i = 0; i &lt; dt.Rows.Count; i++) 
  {
      comboSelectCust.Items.Add(dt.Rows[i]["FName" + "Surname"]);
  }
  </code></pre>