Как создать List и сохранять там модели в MVC?

Заголовок конечно не о чем, но кратно сложно сформулировать. Я хочу сохранять все данные от пользователя не в БД а например в Лист. Например: пользователь сохранил форму и все данные отправились в Лист и нас главной странице появилась запись, потом вторая и т.д. Когда аппликация рестартуется, то все пропадает. Create.cshtml

@using (Html.BeginForm())
    {
        <div class="form-horizontal">
            <h4>Create New System</h4>
            <hr />
            <table>
                <tr>
                    <td class="editor-label">@Html.LabelFor(model => model.sys_id)</td>
                    <td>
                        @Html.EditorFor(model => model.sys_id)
                        @Html.ValidationMessageFor(model => model.sys_id)
                    </td>
                </tr>
                <tr>
                    <td class="editor-label">@Html.LabelFor(model => model.sys_name)</td>
                    <td>
                        @Html.EditorFor(model => model.sys_name)
                        @Html.ValidationMessageFor(model => model.sys_name)
                    </td>
                </tr>
                <tr>
                    <td class="editor-label">@Html.LabelFor(model => model.sys_valid)</td>
                    <td>
                        @Html.EditorFor(model => model.sys_valid)
                        @Html.ValidationMessageFor(model => model.sys_valid)
                    </td>
                </tr>
                <tr>
                    <td class="editor-label">@Html.LabelFor(model => model.sys_deleted)</td>
                    <td>
                        @Html.EditorFor(model => model.sys_deleted)
                        @Html.ValidationMessageFor(model => model.sys_deleted)
                    </td>
                </tr>
                <tr>
                    <td class="editor-label">@Html.LabelFor(model => model.sys_location)</td>
                    <td>
                        @Html.EditorFor(model => model.sys_location)
                        @Html.ValidationMessageFor(model => model.sys_location)
                    </td>
                </tr>
                <tr>
                    <td class="editor-label">@Html.LabelFor(model => model.connection)</td>
                    <td>
                        @Html.EditorFor(model => model.connection)
                        @Html.ValidationMessageFor(model => model.connection)
                    </td>
                </tr>
                <tr>
                    <td class="editor-label">@Html.LabelFor(model => model.sys_type)</td>
                    <td>
                        @Html.EditorFor(model => model.sys_type)
                        @Html.ValidationMessageFor(model => model.sys_type)
                    </td>
                </tr>
                <tr>
                    <td class="editor-label">@Html.LabelFor(model => model.category_authorization)</td>
                    <td>
                        @Html.EditorFor(model => model.category_authorization)
                        @Html.ValidationMessageFor(model => model.category_authorization)
                    </td>
                </tr>
            </table>
            <div class="form-group">
                <div class="col-md-offset-2 col-md-10">
                    <input type="submit" value="Create" class="btn btn-default" />&nbsp;&nbsp;
                    <input type="button" value="Cancel" class="btn btn-default" onclick="window.location.href='@Url.Action("Index")'" />
                </div>
            </div>
        </div>
    }

Controller

 public class SystemsController : Controller
{
    List<SystemViewModel> model = new List<SystemViewModel>() { };
    public ActionResult Index()
    {

        return this.View(model);
    }
    [HttpGet]
    public ActionResult Create()
    {
        return View();
    }
    [HttpPost]
    public ActionResult Create(SystemViewModel systemModel)
    {
        SystemViewModel newModel = new SystemViewModel()
            {
                sys_id = systemModel.sys_id,
                sys_name = systemModel.sys_name,
                sys_valid = systemModel.sys_valid,
                sys_deleted = systemModel.sys_deleted,
                sys_location = systemModel.sys_location,
                connection = systemModel.connection,
                sys_type = systemModel.sys_type,
                category_authorization = systemModel.category_authorization
            };
        model.Add(newModel);
         return RedirectToAction("Index");
    }
}

Model

    public class SystemViewModel 
{
    public long sys_id { get; set; } = 1;
    [DisplayName("System")]
    public string sys_name { get; set; }
    public string sys_valid { get; set; }
    public DateTime? sys_deleted { get; set; }
    public string sys_location { get; set; }
    public string connection { get; set; }
    public string sys_type { get; set; }
    public bool category_authorization { get; set; }
}

Index.cshtml

  @using (this.Html.BeginForm())
    {
        <table>
            <thead>
                <tr>
                    <th>id</th>
                    <th>Name</th>
                    <th>IsValid</th>
                    <th>Deleted</th>
                    <th>Location</th>
                    <th>Connection</th>
                    <th>Type</th>
                    <th>HasCategoryAuthorization</th>
                </tr>
            </thead>
            <tbody>
               @if (Model != null)
               {
                   foreach (var s in Model)
                   {
                    <tr title="Edit" data-link="@Url.Action("Edit", new { sys_id = s.sys_id })">
                        <td class="centered"><p>@s.sys_id</p></td>
                        <td class="centered"><p>@s.sys_name</p></td>
                        <td class="centered"><p>@s.sys_valid</p></td>
                        <td class="centered"><p>@s.sys_deleted</p></td>
                        <td class="centered"><p>@s.sys_location</p></td>
                        <td class="centered"><p>@s.connection</p></td>
                        <td class="centered"><p>@s.sys_type</p></td>
                        <td class="centered"><p>@s.category_authorization</p></td>
                    </tr>
                   }
               }
            </tbody>
        </table>
    }