It's as easy as PM> Install-Package EPPlus.Core.Extensions from nuget

.NET Framework 4.6.1       EPPlus >= 4.1.1

.NET Standard 2.0       EPPlus.Core >= 1.5.4

The project will be documented soon. For now, just look at the test project (EPPlus.Core.Extensions.Tests). It has just enough examples to show you how to use these extension methods.