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Editorial Team
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Asked: 2026-06-13T13:33:56+00:00

Using the interop classes in C# I was able to protect a workbook for

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Using the interop classes in C# I was able to protect a workbook for reading and writing with a password.

Password Dialog

But I want users to be able to open the sheet as read-only.

Read Only Dialog

Is this possible without using the Workbook.SaveAs method?

Protecting a workbook with a password (picture 1) I’m using the Workbook.Password property.

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  1. Editorial Team

    According to MSDN, the only way to change the Workbook.ReadOnlyRecommended property is with the Workbook.SaveAs method.

    In needed precisely what you’re looking for a while ago (i.e. setting it without saving), but had to give in and use SaveAs. To my knowledge it’s the only way.

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