title: excel nuget package for .net core
body: <p>I need some library for .net core to help me create an excel file (no matter the exact file extension). </p>
  
  <p>I tried to use the <code>MICROSOFT.OFFICE.INTEROP.EXCEL.DLL</code> (windows dll), I searched for it in the nuget gallery, I tried to find other package with core support, but I didnt managed to find one.</p>
  
  <p>Is there a library witch can help me?</p>