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In an ASP.NET Core EF Core PostgreSQL application, add permission-controlled moderation of peer gratitude messages. Dele

In an ASP.NET Core EF Core PostgreSQL application, add permission-controlled moderation of peer gratitude messages. Deleting a gratitude must atomically reverse its reputation ledger award and cached user score, with no double subtraction under concurrent deletes, and retain an audit record. Editing preserves sender, …

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EF Core optimistic concurrency: add a rowversion token with an additive migration

Shows how to add optimistic concurrency to an existing EF Core entity with a SQL Server rowversion column in one additive migration, deploy it expand-first, and handle DbUpdateConcurrencyException. Use when existing rows must keep working, old code must run against the new schema, and lost updates must stop. Not for P…

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