MVC 5 - Infinite Loop or recursion on GET - Reflection issue

I am developing in MVC 5, and I am receiving an error on a GET that can return multiple records (900+).

This page also POSTs a multiple row update, but I am receiving the infinite loop on the GET. If the page has a lot of records returned (120ish+), I get the infinite loop error. It doesn't seem to happen on pages with fewer records (<100), but even still, the page takes longer to load than I would expect.

Here is the error:

• Make sure you don't have an infinite loop or infinite recursion

• System.StackOverflowException was unhandled Message: An unhandled exception of type 'System.StackOverflowException' occurred in System.Runtime.Serialization.dll

• I am not getting an error on a particular line, but at one point in the disassembly, I saw an error string.EqualsHelper(string, string) + 0x0000000c in process iisexpress.exe. (This doesn't happen everytime the page crashes)

Is there a problem with my code, or is the problem the number of records returned to the page? There are sometimes 900 records on a page. I could add pagination, but having all records on one page is more efficient for the user. The user bulk sets a field value on the page, and then changes the bulk set value for a varied amount of records.

I have tried both a for and a foreach loop, but I had the same error using both methods (and I am not sure what is the best to use in this circumstance).

I have been working on this for awhile, and I am not finding the problem.

Controller

public ActionResult PCPList(string location, string pcp) 
{
    List<PCPListVM> data = new List<PCPListVM>();
    //query
    data = (from n in db.DataDump                
            join t in db.TData on n.SubscriberID equals t.SubscriberID into joinedTable
            from td in joinedTable.Take(1).DefaultIfEmpty()
            where n.PCP == pcp
            orderby n.MemberName
            select new PCPListVM()
            {
                ID = n.ID,
                MemberName = n.MemberName,
                DateOfBirth = n.DateOfBirth,
                PCP = n.PCP,   
                Location = td.Location,
                LocationList = db.LocationList.Select(c => new SelectListItem
                {
                    Value = c.LocationID,
                    Text = c.LocationList,
                    Selected = c.LocationList.Equals(location)
                }).OrderBy(x => x.Text);
            }).ToList();
    return View(data);
}

View

@model List<Project.ViewModels.PCPListVM>
// loop through records
@if (Model != null && Model.Count > 0)
{
    int j = 0;
    foreach (var i in Model)
    {
        <tr>
            <td>@j</td>
            <td>@i.SubscriberID</td>
            <td>@i.MemberName</td>
            <td>@i.DateOfBirth</td>
            <td>@i.PCP</td>
            <td>
                @Html.DropDownListFor(a => a[j].Location, (IEnumerable<SelectListItem>)ViewBag.location, "", new { @class = "input-sm" })
            </td>
        </tr>
        j++;
    }
}

Model

public class PCPListVM
{
    [Key]
    [Required]
    public string SubscriberID { get; set; }      
    public string MemberName { get; set; }
    public DateTime? DateOfBirth { get; set; }
    public string PCP { get; set; }        
    public string Location { get; set; }       
    public IEnumerable<SelectListItem> LocationList { get; set; }
}

Update -

My test case returns 1200 rows. I have also tried removing the dropdowns altogether to see if they were the issue and the page is still crashing. I have checked in the controller and the correct amount of records are being returned to the viewmodel.

After running the profiler, I am seeing this message: System.Reflection..Get.(.*) = 9.01; You may be using Reflection excessively. It is an expensive operation.

Is there a better way for me to pull this data and loop through it?

The error that I see in the call stack is : System.Runtime.Serialization.DataContract.DataContractCriticalHelper.GetId(System.RuntimeTypeHandle)

When doing the LocationList creation, do this:

LocationList = db.LocationList.Select(c => new SelectListItem
                {
                    Value = c.LocationID,
                    Text = c.LocationList,
                    Selected = c.LocationList.Equals(location)
                }).OrderBy(x => x.Text).ToList()

I'm thinking that Json.NET is having some circular reference problems when trying to serialize the IEnumerable response.