Razor was developed for ASP.NET Web Pages (WebMatrix), which doesn't have the same sort of protection built in regarding Views folders and Routing that you get within MVC.

Since layout pages in Web Pages are not intended to be served directly, they are prefixed with the underscore.

And the Web Pages framework has been configured not to allow files with leading underscores in their names from being requested directly. Other .cshtml files within Web Pages generally need to be browsable.

The ASP.NET team have stated that Web Pages is a starting point within ASP.NET development, which should lead to migration to MVC in time .

[HttpGet]
        public ActionResult _Edit(int id = 0)
        {

            EmpMod = new EmployeeModel();
            EmpMod.EmpId = id;
            EmpRep = new EmployeeRepository();
            EmpMod = EmpRep.EditDetails(EmpMod);
            return PartialView("_Edit", EmpMod);

        }

Part of that means that it should be as easy as possible to migrate from Web Pages to MVC. Consequently, it makes sense to carry over naming conventions established within Web Pages to MVC Razor files.

@model Modal_PopUp_Basic.Models.EmployeeModel

@using (Html.BeginForm("SaveDetails","Home",new { ReturnUrl = ViewBag.ReturnUrl }, FormMethod.Post, new { @class = "form-horizontal", role = "form" }))
    {
        @Html.AntiForgeryToken()

<h4>EmployeeModel</h4>
<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
<div class="form-group">
    <div class="col-md-10">
        @Html.HiddenFor(model => model.EmpId, new { htmlAttributes = new { @class = "form-control" },id="hddnid" })
    </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" }, id = "txtfirstname" })
        @Html.ValidationMessageFor(model => model.FirstName, "", new { @class = "text-danger" })
    </div>
</div>

<div class="form-group">
    @Html.LabelFor(model => model.MiddleName, htmlAttributes: new { @class = "control-label col-md-2" })
    <div class="col-md-10">
        @Html.EditorFor(model => model.MiddleName, new { htmlAttributes = new { @class = "form-control", id = "txtmiddlename" } })
        @Html.ValidationMessageFor(model => model.MiddleName, "", 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" }, id = "txtlastname" })
        @Html.ValidationMessageFor(model => model.LastName, "", new { @class = "text-danger" })
    </div>
</div>

<div class="form-group">
    @Html.LabelFor(model => model.PhoneNo, htmlAttributes: new { @class = "control-label col-md-2" })
    <div class="col-md-10">
        @Html.EditorFor(model => model.PhoneNo, new { htmlAttributes = new { @class = "form-control" } })
        @Html.ValidationMessageFor(model => model.PhoneNo, "", 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.msg, htmlAttributes: new { @class = "control-label col-md-2" })
    <div class="col-md-10">
        @Html.EditorFor(model => model.msg, new { htmlAttributes = new { @class = "form-control" } })
        @Html.ValidationMessageFor(model => model.msg, "", new { @class = "text-danger" })
    </div>
</div>

<div class="form-group">
    <div class="col-md-offset-2 col-md-10">
        <input type="submit" value="Save" class="btn btn-default" />

        @Html.ActionLink("Back to List", "Index")
    </div>




</div>