The main difference is that Database.EnsureCreated() creates a database without tracking schema changes, often used for development or unit testing, whereas migrations provide version control for your database schema, allowing you to apply, rollback, and manage changes over time.

Continuous Delivery is a software development practice where changes are automatically tested and prepared for release to production. It includes automated testing, deployment, and delivery of code changes.

To control access to specific endpoints in an ASP.NET Core Web API, you'd use Authorization Filters. You can apply policies to controllers or actions, and these filters can determine whether a user is authorized to access the resource based on their identity and role. To make some endpoints public, you can use AllowAnonymous attribute or configure policies accordingly.

The "Web Application" template is the suitable choice when you need both Razor-based web pages for user interfaces and API controllers for handling data interactions. This template provides a balanced setup for creating web applications that combine server-rendered Razor pages with APIs for data exchange.

Razor Tag Helpers in ASP.NET Core simplify server-side code in Razor views by providing a more natural way to work with HTML elements and attributes. They make it easier to integrate server-side logic into your views while maintaining clean and readable code.

The primary purpose of the Register action in an ASP.NET Core Identity controller is to handle user registration. It processes user-provided information, such as username, password, and email, and creates a new user account in the system, allowing them to log in subsequently.

The main reason for integrating automated tests into a CI pipeline is to ensure code quality. Automated tests help catch bugs early in the development process, improve the reliability of the application, and provide confidence that changes won't introduce regressions. This ultimately leads to a higher-quality product.

The file extension typically used to define shared Razor directives that can be utilized across multiple views is .razorimports. This file allows you to specify common directives or 'using' statements that should apply to multiple Razor views, streamlining your code and maintaining consistency.

A primary feature of ASP.NET Core Identity is user registration and management. It allows you to create, update, and manage user accounts, including features like user registration, login, password reset, and role-based access control (RBAC).

The UseExceptionHandler middleware is used to display custom error pages to users when an unhandled exception occurs. UseDeveloperExceptionPage, on the other hand, shows detailed exception information during development, but it's not suitable for production as it can leak sensitive information.