How to Create Dynamic Datatable ?

public Datatable DynamicDataTable
{
        DataTable dt = new DataTable();
        dt.Columns.Add("year", typeof(string));
        DataRow dr = null;
        for (int i = 2005; i <= DateTime.Now.Year; i++)
        {
            dr = dt.NewRow();
            dr["year"] = i.ToString() + "-" + (i+1).ToString().Substring(2);
            dt.Rows.Add(dr);
        }
return dt;
}