csharp:Using Array.Empty genericmodel.

Summary: ref T8421

Reviewers: lauromoura, felipealmeida, YOhoho, segfaultxavi

Reviewed By: lauromoura

Subscribers: cedric, reviewers, committers

Tags: efl

Maniphest Tasks: T8421

Differential Revision: https://phab.enlightenment.org/D10501