[DevExpress Support Team: CLONED FROM S170003: ORM Data Model Wizard - Provide the capability to copy properties between persistent objects]
Can't copy custom attribute property from class to class if it has a newline in it, at least not without opening the edit window.
Ticket
T673423
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I could not reproduce this issue in a simple project. Please check the attached video and let me know if you are using the correct steps to reproduce it.