[C#] Null Reference Exception was unhandled

private void frmShrtct_Load(object sender, EventArgs e)
        {
            this.dt2.Fill(this.ds.SHRT_CUT);
            this.dt.Fill(this.ds.DB_SHORTCUT);
            gridControl1.DataSource = bs;
            SqlCommand forOku = new SqlCommand("SELECT Shortcut FROM DB_SHORTCUT",baglanti);
            baglanti.Open();
           SqlDataReader oku= forOku.ExecuteReader();
           ArrayList names = new ArrayList();
           while (oku.Read())
           {
               names.Add(oku["Shortcut"]);
           }
           forOku.Dispose();
           oku.Dispose();     
           for (int i = 0; i <names.Count ; i++)
           {
              if (names[i] == gridView1.GetDataRow(i)["Shortcut"].ToString()) //this line
                { }
                else
                {
                    gridView1.GetDataRow(i)["Shortcut"] = names[i];
                }
           }
        }