Unprotect an excel sheet locked with openxml

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C#

password

Hi I have protected an excel file with this code:


Dim objStyleSheetP As SheetProtection = New SheetProtection()
objStyleSheetP.Password = "123"
objStyleSheetP.Sheet = True
objStyleSheetP.Objects = True
objStyleSheetP.Scenarios = True
objStyleSheetP.AutoFilter = False


If I open excel file and I want unlock it writing 123, it shows a message "the password is incorrect".


Thanks for your help

What I have tried:

I have renamed file xlsx into zip and open sheet.xml. The protection password was 0123 but it not is worked too that