ASP.NET Core Middleware
Summary
Middleware forms the ASP.NET Core HTTP processing pipeline. Each component can execute logic before and after the next component, or terminate the pipeline.

1. Request Pipeline
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2. Middleware Execution Model
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3. next() and Short-Circuiting
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4. Request vs Response Flow
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5. Middleware Ordering
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6. Built-in Middleware
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7. Custom Middleware
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8. Middleware vs Filters
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9. Exception Handling
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10. Authentication and Authorization
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11. Production Considerations
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12. Common Mistakes
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