title: Reordering the AutoIncrement column in datatable
body: <p>i have a datatable Dtable with 3 columns in my winforms.
  in which 1 column is identity column.
  the columns are </p>
  
  <pre><code>DataTable Dtable = new DataTable();
  DataColumn Dcolumn1 = new DataColumn("Slno", typeof(int));
  Dcolumn1.AutoIncrement = true;
  Dcolumn1.AutoIncrementSeed = 1;
  Dcolumn1.AutoIncrementStep = 1;
  Dtable.Columns.Add(Dcolumn1);
  Dtable.Columns.Add("Employeename", typeof(string));
  Dtable.Columns.Add("NoofDays", typeof(int));
  </code></pre>
  
  <p>this datatable is binded to a gridview.</p>
  
  <p>how can i rearrange the order of the datatable.ie..if row no 2 is deleted then row no 3 must become row no 2..like that.</p>
  
  <p>thanks in advance.</p>