Why same theme doesn't apply to different views in Razor? - asp.net-mvc

Question

I have created a two view for displaying and editing using Razor in MVC.
When I run the program the page background image appears and works as I want, but when I click on the edit link it loads the edit view and it just shows a white background.
The first time I thought it doesn't apply the theme. Then I selected the edit view and run it again. There I could see the background image as I expected. But when I go to the displaying view, there wasn't any background image.
Why is this happening? Any suggestions?
These are two images relevant to displaying view and edit view.
This is the view of the page display page
#model OnlineElection.DAL.person
#{
ViewBag.Title = "Index";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<link rel="stylesheet" href="http://fonts.googleapis.com/icon?family=Material+Icons">
<link rel="stylesheet" href="http://cdnjs.cloudflare.com/ajax/libs/materialize/0.97.3/css/materialize.min.css">
<script type="text/javascript" scr="https://code.jquery.com/jquery-2.1.1.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.97.3/js/materialize.min.js"></script>
<div>
<h4>Profile</h4>
<hr />
<dl class="dl-horizontal" style="width:40%; margin-left:10%">
<dt>
#Html.DisplayNameFor(model => model.SID)
</dt>
<dd>
#Html.EditorFor(model => model.SID, new { htmlAttributes = new { #readonly = "" } })
</dd>
<dt>
#Html.DisplayNameFor(model => model.FirstName)
</dt>
<dd>
#Html.EditorFor(model => model.FirstName, new { htmlAttributes = new { #readonly = "" } })
</dd>
<dt>
#Html.DisplayNameFor(model => model.LastName)
</dt>
<dd>
#Html.EditorFor(model => model.LastName, new { htmlAttributes = new { #readonly = "" } })
</dd>
<dt>
#Html.DisplayNameFor(model => model.DOB)
</dt>
<dd>
#Html.EditorFor(model => model.DOB, new { htmlAttributes = new { #readonly = "" } })
</dd>
<dt>
#Html.DisplayNameFor(model => model.email)
</dt>
<dd>
#Html.EditorFor(model => model.email, new { htmlAttributes = new { #readonly = "" } })
</dd>
<dt>
#Html.DisplayNameFor(model => model.password)
</dt>
<dd>
#Html.EditorFor(model => model.password, new { htmlAttributes = new { #readonly = "" } })
</dd>
</dl>
</div>
<p>
#Html.ActionLink("Edit", "Edit", new { id = Model.SID })
</p>
Code of edit view
#model OnlineElection.DAL.person
#{
ViewBag.Title = "Edit";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2>Edit</h2>
#using (Html.BeginForm())
{
#Html.AntiForgeryToken()
<div class="form-horizontal">
<h4>person</h4>
<hr />
#Html.ValidationSummary(true, "", new { #class = "text-danger" })
#Html.HiddenFor(model => model.Person_ID)
<div class="form-group">
#Html.LabelFor(model => model.Phone, htmlAttributes: new { #class = "control-label col-md-2" })
<div class="col-md-10">
#Html.EditorFor(model => model.Phone, new { htmlAttributes = new { #class = "form-control" } })
#Html.ValidationMessageFor(model => model.Phone, "", new { #class = "text-danger" })
</div>
</div>
<div class="form-group">
#Html.LabelFor(model => model.Address, htmlAttributes: new { #class = "control-label col-md-2" })
<div class="col-md-10">
#Html.EditorFor(model => model.Address, new { htmlAttributes = new { #class = "form-control" } })
#Html.ValidationMessageFor(model => model.Address, "", new { #class = "text-danger" })
</div>
</div>
<div class="form-group">
#Html.LabelFor(model => model.FirstName, htmlAttributes: new { #class = "control-label col-md-2" })
<div class="col-md-10">
#Html.EditorFor(model => model.FirstName, new { htmlAttributes = new { #class = "form-control" } })
#Html.ValidationMessageFor(model => model.FirstName, "", new { #class = "text-danger" })
</div>
</div>
<div class="form-group">
#Html.LabelFor(model => model.LastName, htmlAttributes: new { #class = "control-label col-md-2" })
<div class="col-md-10">
#Html.EditorFor(model => model.LastName, new { htmlAttributes = new { #class = "form-control" } })
#Html.ValidationMessageFor(model => model.LastName, "", new { #class = "text-danger" })
</div>
</div>
<div class="form-group">
#Html.LabelFor(model => model.DOB, htmlAttributes: new { #class = "control-label col-md-2" })
<div class="col-md-10">
#Html.EditorFor(model => model.DOB, new { htmlAttributes = new { #class = "form-control" } })
#Html.ValidationMessageFor(model => model.DOB, "", new { #class = "text-danger" })
</div>
</div>
<div class="form-group">
#Html.LabelFor(model => model.SID, htmlAttributes: new { #class = "control-label col-md-2" })
<div class="col-md-10">
#Html.EditorFor(model => model.SID, new { htmlAttributes = new { #class = "form-control" } })
#Html.ValidationMessageFor(model => model.SID, "", new { #class = "text-danger" })
</div>
</div>
<div class="form-group">
#Html.LabelFor(model => model.email, htmlAttributes: new { #class = "control-label col-md-2" })
<div class="col-md-10">
#Html.EditorFor(model => model.email, new { htmlAttributes = new { #class = "form-control" } })
#Html.ValidationMessageFor(model => model.email, "", new { #class = "text-danger" })
</div>
</div>
<div class="form-group">
#Html.LabelFor(model => model.password, htmlAttributes: new { #class = "control-label col-md-2" })
<div class="col-md-10">
#Html.EditorFor(model => model.password, new { htmlAttributes = new { #class = "form-control" } })
#Html.ValidationMessageFor(model => model.password, "", new { #class = "text-danger" })
</div>
</div>
<div class="form-group">
#Html.LabelFor(model => model.AdminApproved, htmlAttributes: new { #class = "control-label col-md-2" })
<div class="col-md-10">
<div class="checkbox">
#Html.EditorFor(model => model.AdminApproved)
#Html.ValidationMessageFor(model => model.AdminApproved, "", new { #class = "text-danger" })
</div>
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Save" class="btn btn-default" />
</div>
</div>
</div>
}
<div>
#Html.ActionLink("Back to List", "Index")
</div>
#section Scripts {
#Scripts.Render("~/bundles/jqueryval")
}