public IQueryable <TModel> SkipAndTake(IQueryable <TModel> queryable)
        {
            if (Page > 0 && Keyword == "")
            {
                queryable = queryable.Skip((Page - 1) * PerPageCount).Take(PerPageCount);
            }
            else if (Page > 0 && Keyword.Any())
            {
                queryable = queryable.Skip((Page - 1) * PerPageCount).Take(PerPageCount);
            }
            else
            {
                Page      = 1;
                queryable = queryable.Skip((Page - 1) * PerPageCount).Take(PerPageCount);
            }

            return(queryable);
        }