How to add openXml or closedxml or microsoft.office

I Want to export excel in asp dot net 5 (dot net core 1.0) in c# . i try openxml, closedxml, microsoft.office.interop.excel to implement that export excel but it not support in dot net core 1.0 .if any other way to export excel in dot net core 1.0. pls guide as how to implement the export excel in dot net core 1.0.

Thanks in advance.