Protect workbooks

## Protect workbooks The examples in this folder demonstrate how to protect workbooks: - IWorkbook.WriteProtection Provides access to the workbook write protection options. - If you set xlsxSaveOptions.Password to save the workbook, the saved workbook will be encrypted. - Use IWorkbook.Protect() to protect the workbook with a password so that other users cannot view hidden worksheets, add, move, delete, hide, or rename worksheets. - Set XlsxSaveOptions.Password to open the workbook, if the password is correct, the workbook will be decrypted. - Use IWorkbook.Unprotect() to unprotect a workbook with a password.