title: Delete row from datatable based on condition
body: <p>In my DataGrid I used a ComboBox in the first column, so it will fetch some data from the database using the <code>DisplayMember</code> and <code>ValueMember</code> concepts. Now I want to remove the value from the ComboBox which is previously selected.</p>
  
  <p>Populating the ComboBox code is given below:</p>
  
  <pre><code>   dTable = getDummyTable.GetDummyTble("Dummy", "DNO", "All");
     dCmbData = dTable;
     cmbDeno.DataSource = dTable;
     cmbDeno.DisplayMember = "dyName";
     cmbDeno.ValueMember = "dyRemarks";
  </code></pre>
  
  <p>The next row of selection there should not be a duplicate value in the ComboBox.</p>
  
  <p>How can I achieve this?</p>
  
  <p>Can anyone help me with this?</p>