private void PrintColumnNames ( DataSet myDataSet ) {


   // for each table in the DataSet, print the ColumnName.
   foreach ( DataTable myTable in myDataSet.Tables ) {
      foreach ( DataColumn myColumn in myTable.Columns ) {
         Response.Write ( myColumn.ColumnName );
      }
    }
}

private void AddColumn ( DataTable myTable ) {
   DataColumn myColumn = new DataColumn ( );

   myColumn.ColumnName = "SupplierID";
   myColumn.DataType = System.Type.GetType ( "System.String" );
   myColumn.Unique = true;
   myColumn.AutoIncrement = false;
   myColumn.Caption = "SupplierID";
   myColumn.ReadOnly = false;

   // add the column to the table's columns collection.
   myTable.Columns.Add ( myColumn );
}

Private Sub PrintColumnNames ( myDataSet As DataSet )
   Dim myTable As DataTable
   Dim myColumn As DataColumn
   ' For each table in the DataSet, print the ColumnName.
   For Each myTable in myDataSet.Tables
      For Each myColumn in myTable.Columns
         Response.Write ( myColumn.ColumnName )
      Next
   Next
End Sub

Private Sub AddColumn ( myTable As DataTable )
   Dim myColumn As New DataColumn ( )
   With myColumn
      .ColumnName = "SupplierID"
      .DataType = System.Type.GetType ( "System.String" )
      .Unique = True
      .AutoIncrement = False
      .Caption = "SupplierID"
      .ReadOnly = False
   End With
   ' add the column to the table's columns collection.
   myTable.Columns.Add ( myColumn )
End Sub