How to authentication in APIs? Flow of .net core app execution? How to do Exception handling? Entity framework best practices Design patterns and SOLID principals

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Answering questions related to .NET Core app execution, authentication, exception handling, Entity Framework best practices, design patterns, and SOLID principles.

Use authentication middleware like JWT or OAuth2
Implement authorization policies to control access to APIs
Use try-catch blocks for exception handling
Use logging to track errors and exceptions
Use dependency injection for Entity Framework
Use repository pattern for data access
Follow SOLID principles for better code design
Use design patterns like Singleton, Factory, and Repository