Hi JL,
Thank you for contacting Syncfusion support.
We have looked into your query and we would like to suggest you to refer the below documentation links.
Configuring EJ1 controls in ASP.NET Core Project using NuGet:
How to render EJ1 TreeView in ASP.NET Core Application:
Demo sample:
For your convenience, we have prepared sample in ASP.NET Core by rendering TreeView component using NuGet packages.
For more details about other platforms, please refer the below link.
Please get back to us if you need any further assistance.
Regards,
Silambarasan