public static void Main()
{
    try
    {
        DataTable userTable = new DataTable("peopleTable");

        userTable.Columns.Add("Id", typeof(int));
        userTable.Columns.Add("Name", typeof(string));

        // Note that even if you create the DataTableReader
        // before adding the rows, the enumerator can still
        // visit all the rows.
        DataTableReader reader = userTable.CreateDataReader();
        userTable.Rows.Add(new object[] { 1, "Peter" });
        userTable.Rows.Add(new object[] { 2, "Mary" });
        userTable.Rows.Add(new object[] { 3, "Andy" });
        userTable.Rows.Add(new object[] { 4, "Russ" });

        IEnumerator enumerator = reader.GetEnumerator();
        // Keep track of whether the row to be deleted
        // has actually been deleted yet. This allows
        // this sample to demonstrate that the enumerator
        // is able to survive row deletion.
        bool isRowDeleted = false;
        while (enumerator.MoveNext())
        { 
            DbDataRecord dataRecord = (DbDataRecord)enumerator.Current;

            // While the enumerator is active, delete a row.
            // This doesn't affect the behavior of the enumerator.
            if (!isRowDeleted)
            {
                isRowDeleted = true;
                userTable.Rows[2].Delete();
            }
            Console.WriteLine(dataRecord.GetString(1));
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex);
    }
    Console.ReadLine();
}