ArgumentNullExceptioncan not be handeled by user.

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ASP.NET

MVC

Hi,
I am fetching the problem with deleteing the record from multiple tables,
When I m trying to delete the record its ocours the exception

ArgumentNullExceptioncan not be handeled by user.
Value cannot be null.
Parameter name: entity

Code :

       [NonAction]
private FinancilInstituteWrappergetData(int id)
        {
FinancilInstituteWrapper temp = newFinancilInstituteWrapper();
var details = from i indb.IIDBS
join a indb.ACDBS
oni.Idequalsa.Id
join b indb.BIDBSoni.Idequalsb.Id
wherei.Id==id
selectnewFinancilInstituteWrapper
                          {
                              II = i,
                              AC = a,
                              BI = b
                          };
foreach (FinancilInstituteWrapper a in details)
            {
temp.II = a.II;
                temp.BI = a.BI;
                temp.AC = a.AC;
            }

return temp;
        }

//
// GET: /FinancilInstitute/Delete/5
publicActionResult Delete(int id=0)
        {
return View(getData(id));
        }

//
// POST: /FinancilInstitute/Delete/5

        [HttpPost,ActionName("Delete")]
publicActionResultDeleteConfirmed(int id = 0)
        {
FinancilInstituteWrapper wrapper = newFinancilInstituteWrapper();         
db.IIDBS.Remove(wrapper.II);
db.ACDBS.Remove(wrapper.AC);
db.BIDBS.Remove(wrapper.BI);
db.SaveChanges();
returnRedirectToAction("Index");           
        }

View:

<%@PageTitle=""Language="C#"MasterPageFile="~/Views/Shared/Site.Master"Inherits="System.Web.Mvc.ViewPage<BachatGatProjectFinal.Controllers.FinancilInstituteWrapper>"%>

<h2>Delete</h2>

<h3>Are you sure you want to delete this?</h3>
<fieldset>
<legend>FinancilInstituteWrapper</legend>

<div>
<%:Html.HiddenFor(m=>m.II.Id) %>
</div>

<div>
        Institute Name
<%:Html.DisplayFor(m=>m.II.InstituteName) %>
</div>

<div>
        Owners First Name
<%:Html.DisplayFor(m=>m.II.OwnersFirstName) %>
</div>

<div>
        Owners Last Name
<%:Html.DisplayFor(m=>m.II.OwnersLastName) %>
</div>

<div>
<%:Html.HiddenFor(m=>m.AC.Id) %>
</div>

<div>
        Address
<%:Html.DisplayFor(m=>m.AC.Address) %>
</div>

<div>
        City
<%:Html.DisplayFor(m=>m.AC.City) %>
</div>

<div>
        State
<%:Html.DisplayFor(m=>m.AC.State) %>
</div>

<div>
PinCode
<%:Html.DisplayFor(m=>m.AC.PinCode) %>
</div>

<div>
        Phone
<%:Html.DisplayFor(m=>m.AC.Phone) %>
</div>

<div>
        Email
<%:Html.DisplayFor(m=>m.AC.Email) %>
</div>

<div>
<%:Html.HiddenFor(m=>m.BI.Id) %>
</div>

<div>
BankName
<%:Html.DisplayFor(m=>m.BI.BankName) %>
</div>

<div>
        Branch
<%:Html.DisplayFor(m=>m.BI.Branch) %>
</div>

<div>
        Account Number
<%:Html.DisplayFor(m=>m.BI.AccountNumber) %>
</div>

<div>
        MICR
<%:Html.DisplayFor(m=>m.BI.MICR) %>
</div>

<div>
        IFSC
<%:Html.DisplayFor(m=>m.BI.IFSC) %>
</div>
</fieldset>
<%using (Html.BeginForm()) { %>
<p>
<inputtype="submit"value="Delete"/> |
<%:Html.ActionLink("Back to List", "Index") %>
</p>
<% } %>

Pls help