LinqToQuerystring.Nancy Query Count for MongoDB queries (possible will work with EF queries)

NancyExtensions.cs

using System.Collections.Generic;
using System.Linq;
using LinqToQuerystring;

namespace LinqToQuerystring.Nancy
{
    public static class NancyExtensions
    {
        public static dynamic LinqToQuerystring<T>(this IQueryable<T> query, IDictionary<string, object> queryDictionary, bool forceDynamicProperties = false, int maxPageSize = -1)
        {
            var genericType = query.GetType().GetGenericArguments()[0];

            bool inlineCount = queryDictionary.ContainsKey("$inlinecount");
            if (inlineCount)
            {
                queryDictionary.Remove("$inlinecount");
            }

            string queryString = GetFullQueryString(queryDictionary);

            object constrainedQuery = query.LinqToQuerystring(genericType, queryString, forceDynamicProperties, maxPageSize);
            IQueryable queryable = constrainedQuery as IQueryable;

            if (inlineCount)
            {
                string countQueryString = GetCountQueryString(queryDictionary);
                object countQuery = query.LinqToQuerystring(genericType, countQueryString, forceDynamicProperties, maxPageSize);
                object results = PackageResults(countQuery as IQueryable<T>, queryable);
                return results;
            }

            return queryable;
        }

        private static string GetCountQueryString(IDictionary<string, object> queryDictionary)
        {
            var joined = string.Join("&", queryDictionary
                .Where(o => o.Key != "$top" && o.Key != "$skip" && o.Key != "$select")
                .Select(o => o.Key + "=" + o.Value));
            var queryString = !string.IsNullOrEmpty(joined) ? "?" + joined : string.Empty;
            return queryString;
        }

        private static string GetFullQueryString(IDictionary<string, object> queryDictionary)
        {
            var joined = string.Join("&", queryDictionary.Select(o => o.Key + "=" + o.Value));
            var queryString = !string.IsNullOrEmpty(joined) ? "?" + joined : string.Empty;
            return queryString;
        }

        private static object PackageResults<T>(IQueryable<T> query, IQueryable constrainedQuery)
        {
            return new Dictionary<string, object> { { "Count", query.Count() }, { "Results", constrainedQuery } };
        }
    }
}