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Asked: 2026-06-11T12:51:04+00:00

Should I add the virtual keyword to my primary key properties? After reading about

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Should I add the virtual keyword to my primary key properties?

After reading about lazy loading, change tracking and the virtual keyword, I realized that I pretty much should have all my properties marked virtual. I am not so sure about my ID properties though, as it makes no sense to load an entity without ID, it would only serve the purpose of more efficient change tracking.

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  1. Editorial Team

    Do you want a change tracking proxy? If so, you must have the virtual keyword on all your properties.

    • The class must be public and not sealed.
    • All properties must have public/protected virtual getters and setters.
    • Collection navigation properties must be declared as ICollection. They cannot be IList, List, HashSet, and so on.

    See this blog post by a member of the EF team

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