title: How to add New Column with Value to the Existing DataTable?
body: <p>I have One DataTable with 5 Columns and 10 Rows.
       Now I want to add one New Column to the DataTable and I want to assign DropDownList value to the New Column.
       So the DropDownList value should be added 10 times to the New Column.
       How to do this?
  Note: Without using FOR LOOP.</p>
  
  <p>For Example: My Existing DataTable is like this.</p>
  
  <pre><code>   ID             Value
    -----          -------
      1              100
      2              150
  </code></pre>
  
  <p>Now I want to add one New Column "CourseID" to this DataTable.
  I have One DropDownList. Its selected value is 1.
  So My Existing Table should be like below:</p>
  
  <pre><code>    ID              Value         CourseID
     -----            ------       ----------
      1                100             1
      2                150             1
  </code></pre>
  
  <p>How to do this?</p>