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I use WebApplicationFactory Customize and ConfigureAppConfiguration to inject test settings.
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IHostApplicationLifetime CancellationToken stops accepting work
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It creates an iterator that produces values lazily.
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Always parameterize user input.
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Store hashed keys, rotate them, bind to scopes, and rate limit.
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It serves wwwroot assets.
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MediatR helps decouple handlers and cross-cutting behaviors.
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An IGrouping sequence per key.
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Complex types bind from route, query, and body based on attributes like FromRoute.
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EF.CompileQuery caches the translation for hot paths.
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It makes assert messages readable with Should().Be style.
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HttpOnly, Secure, SameSite, and tight expiration.
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High-throughput network parsers benefit from Pipelines buffer management.
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It returns a symbol name as a string that refactoring updates.
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Browser cookie sessions need antiforgery on state-changing calls.
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Microsoft.FeatureManagement or LaunchDarkly-style services toggle code paths.
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It eager-loads related data in the query.
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It can avoid allocating a Task when results are often synchronous.
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I never log tokens, passwords, or full connection strings.
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It maps attribute-routed controllers into the endpoint route table.
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