Hi Bruno,
Thanks for contacting Syncfusion support.
We are working for ASP.NET Core support with high priority. It is getting delayed from our side with the parallel progress of other pending features related to RDL standard. It is planned for the completion in month of October. It can be expected in Volume 4, 2017 release which is tentatively scheduled to be released in the month October.
Regards,
Yuvaraj D.