如何在 c# 中使用 EPPlus ExcelPackage 获得复选框选中或未选中状态

Question

有 2 个复选框，复选框 6 - YES 和复选框 7 - NO。 我如何使用 EPPlus 包获得它们的选中或未选中状态.. 我试过这个，但徒劳..

var package = new ExcelPackage(@”C:\file.xlsm”);
var worksheets = package.Workbook.Worksheets;
ExcelWorksheet sheet1 = worksheets.Where(m => m.Name.ToUpper().Contains("sheet1")).SingleOrDefault();

if (sheet1 != null)
{
    var pia = sheet.Cells["C4"].Text.Trim();
    ExcelDrawing checkbox6 = cableWorkOrder.Drawings.SingleOrDefault(a => a.Name == "Check Box 6");
   
    // How to read if check box 6 is checked or not..what is the correct way of doing this? 
}