MvcAntiforgery.cs

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.Helpers;
using System.Web.Mvc;
using Hangfire.Dashboard.Owin;

namespace WebApplication34
{
    public class MvcAntiforgery : IOwinDashboardAntiforgery
    {
        protected string HeaderName = "X-CSRF-Token";

        public string GetToken(IDictionary<string, object> environment)
        {
            AntiForgery.GetTokens(GetCookieToken(), out var cookie, out var formToken);

            if (!String.IsNullOrEmpty(cookie))
            {
                HttpContext.Current.Response.SetCookie(new HttpCookie(
                    AntiForgeryConfig.CookieName,
                    cookie));
            }

            return formToken;
        }

        public bool ValidateRequest(IDictionary<string, object> environment)
        {
            try
            {
                if (HttpContext.Current.Request.HttpMethod.Equals("POST", StringComparison.OrdinalIgnoreCase))
                {
                    AntiForgery.Validate(GetCookieToken(), GetHeaderToken());
                }

                return true;
            }

            catch (HttpAntiForgeryException)
            {
                return false;
            }
        }

        private string GetHeaderToken()
        {
            return HttpContext.Current.Request.Headers[HeaderName];
        }

        private string GetCookieToken()
        {
            var cookie = HttpContext.Current.Request.Cookies[AntiForgeryConfig.CookieName];
            return cookie != null && !String.IsNullOrEmpty(cookie.Value) ? cookie.Value : null;
        }

        string IOwinDashboardAntiforgery.HeaderName => HeaderName;
    }
}

To start using the class above, change your UseHangfireDashboard method call in the following way:

public void Configuration(IAppBuilder app)
{
    // ...
    app.UseHangfireDashboard("/hangfire", new DashboardOptions(), JobStorage.Current, new MvcAntiforgery());
}

Is this Gist only appropriate if we are already using MVC on the site hosting the Hangfire dashboard?
For a standalone (OWIN) Hangfire dashboard installation - or one alongside WebApi only - the MVC AntiForgery dependency may not be available.
Can you suggest an OWIN-only means to mitigate?