title: Select DataGridCell from DataGrid
body: <p>I have a <code>DataGrid</code> WPF control and I want to get a specific <code>DataGridCell</code>. I know the  row and column indices. How can I do this?</p>
  
  <p>I need the <code>DataGridCell</code> because I have to have access to its Content. So if I have (for example) a column of <code>DataGridTextColum</code>, my Content will be a <code>TextBlock</code> object.</p>