title: Update DataGridView bound to DataTable
body: <p>Forgive me for this seemingly obvious question, but my searches have not revealed the answer.</p>
  
  <p>I have a DataGridView bound to a DataTable. Although all rows are displayed in the grid, the table represented by the Grid's DataSource does not get updated after changing values in one or more DataGridView columns. Both grid and table contain a Primary Key. What am I missing here? Do I need to do something in the RowValidated event?</p>
  
  <pre><code>    dgvCriticalContacts.AutoGenerateColumns = False
      Dim ccRs As DataTable = Common.OpenRecordset("SELECT * FROM PhoneList")
      dgvCriticalContacts.DataSource = ccRs
  </code></pre>