title: Datagridview ComboBox is blank
body: <p>I am trying to select a value in the datagridview combo box and from all the googling I think the following should work but it isn't. The problem the dropdown menu is blank initially. I can manually pick a value after that, and it gets saved by my code, but when trying to restore it, the value in the combo box is blank. Just for test  purposes I am manually trying to set the value as "tag1", but even that isn't working.</p>
  
  <pre><code>DataGridViewComboBoxColumn DropMenu = new DataGridViewComboBoxColumn();
  DropMenu.Name = "Tag";
  // getListState returns a list of strings
  DropMenu.DataSource = SettingsSingelton.Instance.getListState();
  DropMenu.ValueType = typeof(string); ;            
  
  dataGridView1.Columns.Add(DropMenu);
  
  for (int i = 0; i &lt; dataGridView1.RowCount &amp;&amp; i &lt; storage.Count; i++)
  {
    DataGridViewComboBoxCell cell = dataGridView1[3, i] as DataGridViewComboBoxCell;
    if (storage[i].tag != null || storage[i].tag != string.Empty)
    {
      cell.Value = "tag1";
    }
  }
  </code></pre>