When defining a one-to-many relationship in Entity Framework Core, the HasMany method is commonly used to represent the "many" side of the relationship. This method allows you to specify the navigation property on the "one" side and configure various aspects of the relationship, such as cascading deletes and foreign key constraints on the "many" side. It's an essential part of modeling complex database relationships.

In ASP.NET Core MVC, the default convention for locating views is in the "Views" folder within the project's directory structure. Views contain the markup and templates used to generate the HTML or other output sent to the client's browser.

ASP.NET Core routing uses a first-match-wins strategy. In this case, the incoming request "/products/new" matches the second route "/products/new" exactly. Therefore, it will not proceed to check other routes and will be handled by the "/products/new" route.

In ASP.NET Core, configuration settings can be stored in various JSON files, such as "appsettings.json" for general settings. However, when deploying to production, the configuration values in "appsettings.Production.json" take precedence over those in "appsettings.json." This allows developers to maintain separate configurations for different environments.

The "Email Confirmation" feature in ASP.NET Core Identity allows users to verify their email addresses before gaining full access to the application. This is crucial for scenarios like e-commerce websites, ensuring that users have valid and verified email addresses before making purchases.

ASP.NET Core introduced a flexible and extensible configuration system that allows developers to configure applications using various sources, such as JSON, XML, environment variables, command-line arguments, and more. This approach offers better configurability and ease of use compared to the traditional ASP.NET configuration methods.

Implementing email confirmation in ASP.NET Core Identity involves several steps. You need to configure an email service, update the Startup.cs to include email settings, send a confirmation link to the user's email, and add a ConfirmEmailAsync method to confirm the email address when the link is clicked.

The appsettings.json file in an ASP.NET Core project typically contains project metadata, package dependencies, and project-specific settings. It's a JSON configuration file used to store various configuration values for the application, such as database connection strings, logging settings, and custom application settings. This separation of configuration from code promotes flexibility and maintainability in ASP.NET Core applications.

Kestrel is a distinctive component in the ASP.NET Core ecosystem because it's a cross-platform, lightweight, and high-performance web server. Unlike some other web servers that are platform-specific, Kestrel can run on Windows, Linux, and macOS, making it a preferred choice for ASP.NET Core hosting. It is often used in combination with reverse proxy servers like Nginx or IIS for production scenarios.

In ASP.NET Core, the 'wwwroot' folder is the default location for storing static web assets like images, scripts, and CSS files. These assets can be directly served to clients without the need for additional routing.