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How to set expiry date in excel file. I tried below code

public static void AddPermission()
            Excel.Application ExcelApp = new Excel.Application();
            Workbook ExcelWorkBook = null;
            ExcelApp.Visible = true;
            ExcelWorkBook = ExcelApp.Workbooks.Open(@"C:\Workspace\OneModernize\April\Mywork\excelAccesssNet\TFSStatus.xlsx"); /// add excel path
            ExcelWorkBook.Permission.Enabled = true;
            DateTime dtExpireDate = DateTime.Now.AddDays(1);
            /// Add user mail
            ExcelWorkBook.Permission.Add("", MsoPermission.msoPermissionFullControl, ExpirationDate: dtExpireDate);



What I have tried:

How to set expiry date in excel file
using c#
BillWoodruff 21-Apr-21 3:15am    
and what happened when you tried it ?
manuel_joseph 21-Apr-21 6:37am    
I got this error while run the application

Exception from HRESULT: 0x80041021
BillWoodruff 21-Apr-21 9:11am    
put breakpoints in your code and single-step through it until you isolate where the error occurs.

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