EPPlus 5/6/7

Overview

EPPlus supports threaded comments from version 5.3.

            
var package = new ExcelPackage();
var sheet = package.Workbook.Worksheets.Add("test");
var person = sheet.ThreadedComments.Persons.Add("John Doe");
var person2 = sheet.ThreadedComments.Persons.Add("Jane Doe");
var thread = sheet.Cells["A1"].AddThreadedComment();
var c1 = thread.AddComment(person2.Id, "Hello");
var c2 = thread.AddComment(person.Id, "Hello {0}, how are you?", person2);