Contact.cshtml

@page
@model RazorPartialToString.Pages.ContactModel
@if(TempData["PostResult"] == null)
{
    <form method="post">
        <label asp-for="ContactForm.Name"></label>
        <div class="form-group">
            <input asp-for="ContactForm.Name">
        </div>
        <label asp-for="ContactForm.Email"></label>
        <div class="form-group">
            <input asp-for="ContactForm.Email">
        </div>
        <label asp-for="ContactForm.Subject"></label>
        <div class="form-group">
            <input asp-for="ContactForm.Subject">
        </div>
        <label asp-for="ContactForm.Message"></label>
        <div class="form-group">
            <textarea asp-for="ContactForm.Message"></textarea>
        </div>
        <label asp-for="ContactForm.Priority"></label>
        <div class="form-group">
            <select asp-for="ContactForm.Priority" asp-items="Html.GetEnumSelectList<Priority>()">
                <option value="">Set Priority</option>
            </select>
        </div>
        <div class="form-group">
            <button class="btn btn-sm btn-primary">Submit </button>
        </div>
    </form>
}
else
{
    <p>@TempData["PostResult"]</p>
}