copying the data table content to an excel file by click on a button

DataTable dt = new DataTable();
            dt.Columns.Add("ID", typeof(int));
            dt.Columns.Add("Name", typeof(string));
            dt.AcceptChanges();
            DataRow dr;
            for (int i = 0; i < 5; i++)
            {
                dr = dt.NewRow();
                dr[0] = i + 1;
                dr[1] = "Name-" + (i + 1);
                dt.Rows.Add(dr);
            }
            dt.AcceptChanges();
            string Record="";
            StreamWriter fileWriter = new StreamWriter("D:\\Data.csv");
            //Insert Headers
            fileWriter.WriteLine("ID,Name");
            foreach(DataRow row in dt.Rows)
            {
                Record = "";
                for (int j = 0; j < dt.Columns.Count;j++ )
                    Record += row[j].ToString() + ",";
                    fileWriter.WriteLine(Record);
            }
            fileWriter.Close();