using System; using ClosedXML.Excel; namespace ClosedXML_Examples.Misc { public class WorkbookProtection : IXLExample { #region Methods // Public public void Create(String filePath) { using (var wb = new XLWorkbook()) { var ws = wb.Worksheets.Add("Workbook Protection"); wb.Protect(true, false, "Abc@123"); wb.SaveAs(filePath); } } #endregion } }