Problem scenario:

Generic Orderby Func

private static Func<IQueryable<TSource>, IOrderedQueryable<TSource>> OrderByFunc<TSource>(string propertyName, bool ascending = true)
        {
            var source = Expression.Parameter(typeof(IQueryable<TSource>), "source");
            var item = Expression.Parameter(typeof(TSource), "item");
            var member = Expression.Property(item, propertyName);
            var selector = Expression.Quote(Expression.Lambda(member, item));
            var body = Expression.Call(
                typeof(Queryable), ascending ? "OrderBy" : "OrderByDescending",
                new Type[] { item.Type, member.Type },
                source, selector);
            var expr = Expression.Lambda<Func<IQueryable<TSource>, IOrderedQueryable<TSource>>>(body, source);
            var func = expr.Compile();
            return func;
        }