ASP.NET

<configuration>
  <connectionStrings>

    <add name="ConnStr" connectionString="Data Source = inayat; Initial Catalog = KIU; User ID=sa; Password=jan5562"/>
  </connectionStrings>
    <system.web>
        <compilation debug="true" targetFramework="4.0"/>
    <authentication mode="Forms">
      <forms name="KIUAuth" loginUrl="login.aspx" protection="All" path="KIUAuth/" timeout="30" slidingExpiration="true"/>
    </authentication>
    </system.web>
</configuration>

The type or namespace name 'Optimization' does not exist in the namespace 'System.Web'
The type or namespace name 'DotNetOpenAuth' could not be found

GridViewRow row = AdminSearchGridView.Rows[index]

<asp:GridView ID="AdminSearchGridView" runat="server" AutoGenerateColumns="False"
Style="color: #333333; border-collapse: collapse; font-size: 14px; 
text-align: center;width: 1530px; margin-left: 0px; margin-top: 0px" CellPadding="4" ForeColor="#333333"
AutoGenerateDeleteButton="True" DataKeyNames="ID" OnRowDeleting="AdminSearchGridView_RowDeleting"
OnRowCommand="AdminSearchGridView_RowCommand">
<AlternatingRowStyle BackColor="White" />

     <Columns>
<asp:ButtonField ButtonType="Button" Text="Issue" CommandName="Issue" />
 <asp:BoundField DataField="IssueStatus" HeaderText="Issue Status" />
 <asp:BoundField DataField="AccessionNo" HeaderText="Accession Number" />
 <asp:BoundField DataField="CallNo" HeaderText="Call Number" />
 <asp:BoundField DataField="Title" HeaderText="Title" />
    </Columns>
    </asp:GridView>

protected void AdminSearchGridView_RowCommand(object sender, GridViewCommandEventArgs e)
  {
   if (e.CommandName == "Issue")
      {
        int index = Convert.ToInt32(e.CommandArgument);

 GridViewRow row = AdminSearchGridView.Rows[index]; // INDEX OUT OF RANGE ERE

 string accessno = AdminSearchGridView.Rows[index].Cells[3].Text;
 string title = AdminSearchGridView.Rows[index].Cells[5].Text;
                

       Session["accessno"] = accessno;
       Session["title"] = title;
             }
         }

string connString = ConfigurationManager.ConnectionStrings["DL"].ConnectionString;

            using (SqlConnection con = new SqlConnection(connString))
            {

                SqlCommand cmd = new SqlCommand("spGetAllEmployees", con);
                cmd.CommandType = CommandType.StoredProcedure;
                con.Open();

                SqlDataReader rdr = cmd.ExecuteReader();
                while (rdr.Read())
                {
                    Employee employee = new Employee();
                    employee.ID = Convert.ToInt32(rdr["ID"]);
                    employee.Name = rdr["name"].ToString();
                    employee.Gender = rdr["gender"].ToString();
                    employee.City = rdr["city"].ToString();
                    employee.DateOfBirth = Convert.ToDateTime(rdr["dateofbirth"]);

                    Employees.Add(employee);

                }

            }