DataTable to array in c#

DataTable dtResult;
//Populate Datatable
int[] firstRow = dtResult.AsEnumerable()
                       .Take(1)
                       .ToArray();

DataRow[] dr = dt.AsEnumerable().Take(1).ToArray();
object[] dr1 = dr[0].ItemArray;
int[] dr2 = Array.ConvertAll(dr1, (p => Convert.ToInt32(p)));