Как извлечь текст примечания из определенной ячейки листа Excel?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Excel = Microsoft.Office.Interop.Excel;
 
class Program
{
    static void Main(string[] args)
    {
        Excel.Application application = new Excel.Application();
        string fileName = @"C:\Книга1.xlsx";
        Object missing = Type.Missing;
        application.Workbooks.Open(fileName, missing, missing, missing,
            missing, missing, missing, missing, missing,
            missing, missing, missing, missing, missing,missing);
        Excel.Worksheet sheet = (Excel.Worksheet)application.ActiveSheet;
        string comment = (sheet.Cells[2, 1] as Excel.Range).
            Comment.Shape.TextFrame
            .Characters(missing, missing).Text;
        Console.WriteLine(comment);
        application.Visible = true;
        Console.ReadKey(true);
    }
}