| ProtectWorksheet | Protect the worksheet using the default protection options. |
| ProtectWorksheet(ExcelProtectionAllowFlags) | Protects the worksheet and allows only the operations specified by the protection flags. |
| ProtectWorksheet(String) | Protect the worksheet using the default protection options and set a password required to unprotect the worksheet. |
| ProtectWorksheet(String, ExcelProtectionAllowFlags) | Protects the worksheet and allows only the operations specified by the protection flags and set a password required to unprotect the worksheet. |