get people or group value into single array of single item

string[] delimit = new string[] { ";#" };

                           

                            string[] stringarray = item["TargetAudience"].ToString().Split((delimit), StringSplitOptions.RemoveEmptyEntries);

                            StringBuilder sb = new StringBuilder();

                            for (int i = 0; i < stringarray.Length; i++)

                            {

                                if (i % 2 != 0)

                                {

                                    sb.Append(stringarray[i].ToString()+",");

                                }

                            }