Hi Emanuele Filardo,
Thanks for the contacting Syncfusion support,
Intelligence on Visual Studio 2015
Tag helper is working fine for EJ components with 2015 Visual studio. We suspect that the issue may be caused due to any conflict with packages, so please clear cache, then restart Visual studio and check. If still you are facing any difficulties please let us know.
Intelligence on Visual Studio 2017
Also with Visual studio 2017, it’s not working in our side too. While analyzing on this it seems as known issue with ASP.NET core in Visual Studio 2017. Please refer the below link:
Still we are currently analyzing on this issues to get the solution we will update you once we got the solution.
Regarding Document netcore app.1.1
We have provided the support with netcore app 1.1 in 15.1600.0.37 version. Also we have completed the document with netcore 1.1 and it’s in review phase. We will update the document in one business day (6th March , 2017)
Regards,
Sasikala Nagarajan