aspnetcore/src/Microsoft.AspNet.Mvc.Core/UrlHelperExtensions.cs

namespace Microsoft.AspNet.Mvc
{
    public static class UrlHelperExtensions
    {
        public static string Action([NotNull] this IUrlHelper helper)
        {
            return helper.Action(
                action: null, 
                controller: null, 
                values: null, 
                protocol: null, 
                host: null, 
                fragment: null);
        }

        public static string Action([NotNull] this IUrlHelper helper, string action)
        {
            return helper.Action(action, controller: null, values: null, protocol: null, host: null, fragment: null);
        }

        public static string Action([NotNull] this IUrlHelper helper, string action, object values)
        {
            return helper.Action(action, controller: null, values: values, protocol: null, host: null, fragment: null);
        }

        public static string Action([NotNull] this IUrlHelper helper, string action, string controller)
        {
            return helper.Action(action, controller, values: null, protocol: null, host: null, fragment: null);
        }

        public static string Action([NotNull] this IUrlHelper helper, string action, string controller, object values)
        {
            return helper.Action(action, controller, values, protocol: null, host: null, fragment: null);
        }

        public static string Action(
            [NotNull] this IUrlHelper helper, 
            string action, 
            string controller, 
            object values, 
            string protocol)
        {
            return helper.Action(action, controller, values, protocol, host: null, fragment: null);
        }

        public static string Action(
            [NotNull] this IUrlHelper helper, 
            string action, 
            string controller, 
            object values, 
            string protocol, 
            string host)
        {
            return helper.Action(action, controller, values, protocol, host, fragment: null);
        }

        public static string RouteUrl([NotNull] this IUrlHelper helper, object values)
        {
            return helper.RouteUrl(values, protocol: null, host: null, fragment: null);
        }

        public static string RouteUrl([NotNull] this IUrlHelper helper, object values, string protocol)
        {
            return helper.RouteUrl(values, protocol, host: null, fragment: null);
        }

        public static string RouteUrl([NotNull] this IUrlHelper helper, object values, string protocol, string host)
        {
            return helper.RouteUrl(values, protocol, host, fragment: null);
        }
    }
}