public void TestWriteProtection()
{
HSSFWorkbook wb = new HSSFWorkbook();
Assert.IsFalse(wb.IsWriteProtected);
wb.WriteProtectWorkbook("mypassword", "myuser");
Assert.IsTrue(wb.IsWriteProtected);
wb.UnwriteProtectWorkbook();
Assert.IsFalse(wb.IsWriteProtected);
}