Get multiple users into a array of single SPListItem

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

DataRow dr = dt.NewRow();

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()+",");

    }

}