Indexoutofrange exception was unhandled by user code there is no row at position 0

string productids = string.Empty;
            DataTable dt;

            if (Session["MyCart"] != null)
            {
                dt = (DataTable)Session["MyCart"];

                tkbsonsmerchant k = new tkbsonsmerchant()
                {
                    CustomerName = txtCustomerName.Text,
                    CustomerEmailID = txtCustomerEmailID.Text,
                    CustomerAddress = txtCustomerAddress.Text,
                    CustomerPhoneNo = txtCustomerPhoneNo.Text,
                    TotalPrice = Convert.ToInt32(txtTotalPrice.Text),
                    ProductList = productids,
                    PaymentMethod = rblPaymentMethod.SelectedItem.Text
                };

                DataTable dtResult = k.SaveCustomerDetails();


                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    tkbsonsmerchant SaveProducts = new tkbsonsmerchant()
                    {
                        
  //BELOW LIEN HERE IS ERROR CAME  -  INDEX OUT OF RANGE EXCEPTION WAS UNHANDLED BY USER CODE - THERE IS ROW AT POSITION 0.
                      CustomerID = Convert.ToInt32(dtResult.Rows[0][0]),
                        ProductID = Convert.ToInt32(dt.Rows[i]["ProductID"]),
                    };
                    SaveProducts.SaveCustomerProducts();
                }

                Session.Clear();



                lblTransactionNo.Text = "Your Transaction No :-" + dtResult.Rows[0][0];

                pnlOrderPlacedSuccessfully.Visible = true;


              sendOrderPlacedAlert(txtCustomerName.Text, txtCustomerEmailID.Text, Convert.ToString(dtResult.Rows[0][0]));

              


                txtCustomerAddress.Text = string.Empty;
                txtCustomerEmailID.Text = string.Empty;
                txtCustomerName.Text = string.Empty;
                txtCustomerPhoneNo.Text = string.Empty;
                txtTotalPrice.Text = "0";
                txtTotalProducts.Text = "0";
            }