title: How to get the selected column count in datagrid
body: <p>I want selected column's index of the DataGrid. For example, if I select the first column, I want the first column's index (index = 0).</p>
  
  <p>I tried it in the DataGrid SelectionChanged event, but I can't seem to get the particular column index. If any one knows how to do it, help me with some sample code.</p>