asp.net-mvc - NullReferenceException を引き起こすアクションを作成する

Question

突然、作成アクション/ビューが NullReferenceException を引き起こし始めました。実はbootstrap twitter 3に移行してから始めました。

これは、例外を引き起こしている最初の行です。

@Html.LabelFor(model => model.Name, new { @class = "col-lg-2 control-label" })

これが私のコントローラーコードです：

        //
        // GET: /Panel/Partners/Create/
        [Authorize]
        public ActionResult Create()
        {
            ViewData["Logo"] = "";

            return View();
        }

部分図 (フォーム):

@model MyApp.Entities.Partner

<fieldset data-listurl="@Url.Action("Index", "Partners", new { Area = "Panel" })" data-removelogo="@Url.Action("RemoveLogo", "Partners", new { Area = "Panel" })">
    <legend>Partners</legend>


    <div class="form-group">
        @Html.LabelFor(model => model.Name, new { @class = "col-lg-2 control-label" })
        <div class="col-lg-10">
            <div class="col-lg-7">
                <input type="text" id="Name" name="Name" value="@Model.Name" class="form-control" />
                @Html.ValidationMessageFor(model => model.Name)
            </div>
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Logo, new { @class = "col-lg-2 control-label" })
        <div class="col-lg-10">
            <div id="file-upload">
                <div class="col-lg-9">
                    <span class="">@(ViewData["Logo"] == null || String.IsNullOrWhiteSpace(ViewData["Logo"].ToString()) ? "No file" : ViewData["Logo"].ToString()) </span>

                    <a href="#" class="btn btn-primary select-button">Choose</a>
                </div>
                <input type="file" name="fileUpload" id="fileUpload" style="left: 0; top: -5000px; position: absolute;" />
            </div>@Html.HiddenFor(model => model.Logo)
            <div class="col-lg-9">
                @if (ViewData["Logo"] != null && !String.IsNullOrWhiteSpace(ViewData["Logo"].ToString()))
                {
                    <p><img src="@String.Concat("http://remotepark.blob.core.windows.net/pictures/", ViewData["Logo"])" id="logoView" class="img-thumbnail" style="max-height: 150px" /></p>
                    <p><a href="#" class="btn btn-default remove-button">Remove</a></p>
                }
            </div>
        </div>
    </div>

    <div class="row form-actions">
        <div class="col-lg-12">
            <input type="submit" id="btnSubmit" class="btn btn-primary" value="Save" />
            <input type="button" class="btn" id="btnCancelar" value="Cancel" />
        </div>
    </div>
</fieldset>

作成.cshtml

@model MyApp.Entities.Partner

<div class="panel-middle-top">
    <div class="middle-top-left"></div>
    <div class="middle-top-center">
        <ul class="breadcrumb" style="background-color: transparent;">
            <li><a href="@Url.Action("Index", "Home", new { Area = "Panel" })">Home</a></li>
            <li><a href="@Url.Action("Index", "Partners", new { Area = "Panel" })">Partners</a></li>
            <li class="active">New</li>
        </ul>
    </div>
    <div class="middle-top-right"></div>
</div>
<div class="panel-middle-content">
    @Html.Partial("/Areas/Panel/Views/Shared/_Alerts.cshtml")

    @using (Html.BeginForm("Create", "Partners", 
        FormMethod.Post, 
        new { 
            enctype = "multipart/form-data", 
            id = "partnersForm",
            @class="form-horizontal", 
            rule="form"
        }))
    {
        @Html.Partial("_PartnersForm")
    }
</div>

モデルクラス

public partial class Partner
    {
        #region Primitive Properties

        public int ID { get; set; }

        public string Name { get; set; }

        public string Logo { get; set; }

        /// <summary>
        /// Indicater whether this partner is associated to the current parking lot
        /// </summary>
        public bool Associated { get; set; }

        #endregion

        #region Navigation Properties

        public ICollection<ParkingLot> ParkingLots
        {
            get
            {
                if (_parkingLots == null)
                {
                    var newCollection = new FixupCollection<ParkingLot>();
                    newCollection.CollectionChanged += FixupParkingLots;
                    _parkingLots = newCollection;
                }
                return _parkingLots;
            }
            set
            {
                if (!ReferenceEquals(_parkingLots, value))
                {
                    var previousValue = _parkingLots as FixupCollection<ParkingLot>;
                    if (previousValue != null)
                    {
                        previousValue.CollectionChanged -= FixupParkingLots;
                    }
                    _parkingLots = value;
                    var newValue = value as FixupCollection<ParkingLot>;
                    if (newValue != null)
                    {
                        newValue.CollectionChanged += FixupParkingLots;
                    }
                }
            }
        }
        private ICollection<ParkingLot> _parkingLots;

        #endregion

        #region Association Fixup

        private void FixupParkingLots(object sender, NotifyCollectionChangedEventArgs e)
        {
            if (e.NewItems != null)
            {
                foreach (ParkingLot item in e.NewItems)
                {
                    if (!item.Partners.Contains(this))
                    {
                        item.Partners.Add(this);
                    }
                }
            }

            if (e.OldItems != null)
            {
                foreach (ParkingLot item in e.OldItems)
                {
                    if (item.Partners.Contains(this))
                    {
                        item.Partners.Remove(this);
                    }
                }
            }
        }

        #endregion

    }

何か不足していますか？