When would you use EF Core shadow properties, and when would you avoid them?

Shadow properties and audit columns in EF Core

Explains EF Core shadow properties for audit or infrastructure columns with practical .NET data-access examples and production trade-offs.

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Shadow properties are EF Core properties that exist in the model but not on the CLR entity class. They can be useful for infrastructure data like audit columns or foreign keys that the domain object does not need to expose directly. For example, CreatedAt or TenantId could be configured as shadow properties in some designs.

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Explain EF Core shadow properties for audit or infrastructure columns with practical .NET data-access examples and production trade-offs. It matters in real backend work because query shape, indexes, transactions, locking, and data volume can turn harmless-looking code into a production bottleneck. The practical angle is eF Core shadow properties for audit or infrastructure columns, EF Core/SQL behavior, API boundaries, production risks, and practical debugging or design judgment, tied to a concrete production decision.
Shadow properties are EF Core properties that exist in the model but not on the CLR entity class. They can be useful for infrastructure data like audit columns or foreign keys that the domain object does not need to expose directly. For example, CreatedAt or TenantId could be configured as shadow properties in some designs.
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Treating EF Core shadow properties for audit or infrastructure columns as a syntax detail instead of a production behavior.
Not checking generated SQL, query plans, or actual data volume.
Testing only with tiny local data and assuming production will behave the same.
Fixing symptoms with caching, timeouts, or retries before understanding the data-access cause.

When would you use EF Core shadow properties, and when would you avoid them?

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