I am using petapoco orm in mvc 4. when i going to show my total client list from database table it showing me object reference not set to and instance of a object. I have also some data or information in my Client Table. Why this error is showing , Please help me...
my index view is.

```
@model IEnumerable<FCBook.Client>

@{
    ViewBag.Title = "Client list";
}

<h2>Index</h2>

<p>
    @Html.ActionLink("Create New", "Create")
</p>
<table>
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.ClientName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.ContactName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.PhoneNo)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Fax)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Email)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Address)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.City)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.PostalCode)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Country)
        </th>
        <th></th>
    </tr>

@foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.ClientName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.ContactName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.PhoneNo)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Fax)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Email)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Address)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.City)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.PostalCode)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Country)
        </td>
        <td>
            @Html.ActionLink("Edit", "Edit", new { id=item.ClientId }) |
            @Html.ActionLink("Details", "Details", new { id=item.ClientId }) |
            @Html.ActionLink("Delete", "Delete", new { id=item.ClientId })
        </td>
    </tr>
}

</table>

```

Controller :

```
public ActionResult Create()
        {
            return View();
        }

        //
        // POST: /Client/Create

        [Httppost]
        public ActionResult Create(Client collection)
        {
            try
            {
                // TODO: Add insert logic here
                var db = new PetaPoco.Database("FCbook");
                if (collection != null)
                {
                    collection.Insert();
                }

                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }

```