XEncryption CanChange Property. Whether a user can modify the document. ABCpdf .NET PDF Library.

This property determines if people who supply the user password can change the document.

Changing is defined as modifying the document in any way other than those controlled by the CanEdit, CanFillForms or CanAssemble properties.

This property is only applied if the Type is set to 1 or higher.

See the Doc.Encryption property.